Free calculators with sources: electricity bills (KR/TW/PH/JP), Korea taxi fares, tax refunds.
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Busan taxi fare (regular mid-size taxi meter estimate). Same code as https://koreasurvivalkit.com/busan-taxi-fare-calculator/. Reference: Source: Busan Metropolitan City, taxi fares in effect since 1 June 2023 (checked September 2026). Returns an estimate with the source and page URL.
Busan taxi fare (regular mid-size taxi meter estimate). Same code as https://koreasurvivalkit.com/busan-taxi-fare-calculator/. Reference: Source: Busan Metropolitan City, taxi fares in effect since 1 June 2023 (checked September 2026). Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| km* | number | |
| hour | integer | |
| outside_busan | boolean | |
| slow_traffic_minutes | number |
{
"type": "object",
"required": [
"km"
],
"properties": {
"km": {
"type": "number",
"default": 10,
"maximum": 500,
"minimum": 0
},
"hour": {
"type": "integer",
"default": 14,
"maximum": 23,
"minimum": 0
},
"outside_busan": {
"type": "boolean",
"default": false
},
"slow_traffic_minutes": {
"type": "number",
"default": 10,
"maximum": 600,
"minimum": 0
}
}
}교육비 세액공제 (Korean education expense tax credit, 2026 spending). Same code as https://gyesanmate.com/education-tax-credit/. Reference: 출처: 소득세법 제59조의4, 2025년 세법개정(2025.12 국회 통과). Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| items* | array | Per person: "kind:spend" in GET (e.g. school:3500000,college:8000000) or [{kind, spend}] in JSON |
| decided_tax | number | Expected decided tax (credit is capped at this) |
{
"type": "object",
"required": [
"items"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"kind",
"spend"
],
"properties": {
"kind": {
"enum": [
"self",
"preschool",
"school",
"college",
"disabled"
],
"type": "string"
},
"spend": {
"type": "number",
"minimum": 0
}
}
},
"maxItems": 30,
"description": "Per person: \"kind:spend\" in GET (e.g. school:3500000,college:8000000) or [{kind, spend}] in JSON"
},
"decided_tax": {
"type": "number",
"maximum": 100000000000,
"minimum": 0,
"description": "Expected decided tax (credit is capped at this)"
}
}
}갭투자 실투자금 (Korean "gap" investment: acquisition tax, brokerage, cash needed). Same code as https://gyesanmate.com/gap-investment/. Reference: 출처: 지방세법 제13조의2(시행 2026.1.1)·제151조 · 1주택 세율·중개보수는 최신 공지 확인 · 투자 권유 아님. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| price* | number | |
| years | number | |
| houses | integer | Number of homes after buying |
| jeonse* | number | |
| over_85m2 | boolean | |
| other_costs | number | |
| adjusted_area | boolean | |
| growth_percent | number |
{
"type": "object",
"required": [
"price",
"jeonse"
],
"properties": {
"price": {
"type": "number",
"maximum": 1000000000000,
"minimum": 1
},
"years": {
"type": "number",
"default": 0,
"maximum": 50,
"minimum": 0
},
"houses": {
"type": "integer",
"default": 1,
"maximum": 99,
"minimum": 1,
"description": "Number of homes after buying"
},
"jeonse": {
"type": "number",
"maximum": 1000000000000,
"minimum": 0
},
"over_85m2": {
"type": "boolean",
"default": false
},
"other_costs": {
"type": "number",
"default": 0,
"maximum": 100000000000,
"minimum": 0
},
"adjusted_area": {
"type": "boolean",
"default": false
},
"growth_percent": {
"type": "number",
"default": 0,
"maximum": 50,
"minimum": -50
}
}
}학점 비례 환산 (GPA scale conversion 4.5 / 4.3 / 4.0). Same code as https://gyesanmate.com/gpa-converter/. Reference: 기준: 단순 비례 환산(참고용) · 학교·기업마다 환산식이 다르므로 지원처 기준이 우선. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| score* | number | |
| to_scale | number | |
| from_scale | number |
{
"type": "object",
"required": [
"score"
],
"properties": {
"score": {
"type": "number",
"maximum": 4.5,
"minimum": 0
},
"to_scale": {
"enum": [
4.5,
4.3,
4
],
"type": "number",
"default": 4.3,
"maximum": 4.5,
"minimum": 4
},
"from_scale": {
"enum": [
4.5,
4.3,
4
],
"type": "number",
"default": 4.5,
"maximum": 4.5,
"minimum": 4
}
}
}Japan electricity bill (TEPCO Juryo Dento B). Same code as https://kwhmate.com/jp/electricity-bill/. Reference: 出典：東京電力エナジーパートナー「従量電灯B・C」・燃料費調整単価等一覧、経済産業省「2026年度の賦課金単価」. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| kwh* | number | |
| amperes | integer | |
| fuel_adjustment | number | Fuel cost adjustment, yen per kWh (default: this month) |
{
"type": "object",
"required": [
"kwh"
],
"properties": {
"kwh": {
"type": "number",
"default": 260,
"maximum": 100000,
"minimum": 0
},
"amperes": {
"enum": [
10,
15,
20,
30,
40,
50,
60
],
"type": "integer",
"default": 30,
"maximum": 60,
"minimum": 10
},
"fuel_adjustment": {
"type": "number",
"default": -9.3,
"maximum": 100,
"minimum": -100,
"description": "Fuel cost adjustment, yen per kWh (default: this month)"
}
}
}Japan LED replacement savings (TEPCO Juryo Dento B, 30 A). Same code as https://kwhmate.com/jp/led-savings/. Reference: 出典：東京電力エナジーパートナー「従量電灯B」. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| count | integer | Number of lights |
| led_cost | number | Total cost of the LEDs (optional, for payback) |
| new_watts | number | Watts of one LED |
| old_watts | number | Watts of one old bulb/tube |
| other_kwh | number | Other monthly household use without these lights (kWh) |
| hours_per_day | number |
{
"type": "object",
"required": [],
"properties": {
"count": {
"type": "integer",
"default": 10,
"maximum": 10000,
"minimum": 1,
"description": "Number of lights"
},
"led_cost": {
"type": "number",
"default": 0,
"maximum": 1000000000,
"minimum": 0,
"description": "Total cost of the LEDs (optional, for payback)"
},
"new_watts": {
"type": "number",
"default": 9,
"maximum": 5000,
"minimum": 0,
"description": "Watts of one LED"
},
"old_watts": {
"type": "number",
"default": 60,
"maximum": 5000,
"minimum": 0,
"description": "Watts of one old bulb/tube"
},
"other_kwh": {
"type": "number",
"default": 260,
"maximum": 100000,
"minimum": 0,
"description": "Other monthly household use without these lights (kWh)"
},
"hours_per_day": {
"type": "number",
"default": 8,
"maximum": 24,
"minimum": 0
}
}
}Korea tourist tax (VAT) refund estimate. Same code as https://koreasurvivalkit.com/tax-refund-calculator/. Reference: Sources checked October 2026: VISITKOREA, Korea.net, Incheon Airport, Visit Seoul. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| store | string | instant = store offers instant refund at the till |
| amounts* | array | Receipt amounts in KRW (one per store receipt) |
| stay_days | integer |
{
"type": "object",
"required": [
"amounts"
],
"properties": {
"store": {
"enum": [
"instant",
"regular"
],
"type": "string",
"default": "instant",
"description": "instant = store offers instant refund at the till"
},
"amounts": {
"type": "array",
"items": {
"type": "number",
"maximum": 1000000000,
"minimum": 0
},
"maxItems": 50,
"description": "Receipt amounts in KRW (one per store receipt)"
},
"stay_days": {
"type": "integer",
"default": 7,
"maximum": 3650,
"minimum": 1
}
}
}Korea household electricity bill (KEPCO residential low-voltage, progressive tiers). Same code as https://kwhmate.com/ko/electricity-bill/. Reference: 기준: 2026년 4분기 요금 · 출처: 한국전력공사 주택용 전력(저압) 요금표. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| kwh* | number | Monthly usage in kWh |
| season | string | summer = July–August tiers |
{
"type": "object",
"required": [
"kwh"
],
"properties": {
"kwh": {
"type": "number",
"default": 300,
"maximum": 100000,
"minimum": 0,
"description": "Monthly usage in kWh"
},
"season": {
"enum": [
"normal",
"summer"
],
"type": "string",
"default": "normal",
"description": "summer = July–August tiers"
}
}
}Korea LED replacement savings (household tiers or shop unit price). Same code as https://kwhmate.com/ko/led-savings/. Reference: 기준: 2026년 한전 주택용 저압 요금표(기타 계절) · 가게·사무실은 고지서 단가 직접 입력. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| mode | string | home = KEPCO progressive tiers, shop = unit_price × kWh |
| count | integer | |
| led_cost | number | |
| new_watts | number | |
| old_watts | number | |
| other_kwh | number | home: monthly use without these lights |
| unit_price | number | shop: KRW per kWh |
| hours_per_day | number |
{
"type": "object",
"required": [],
"properties": {
"mode": {
"enum": [
"home",
"shop"
],
"type": "string",
"default": "home",
"description": "home = KEPCO progressive tiers, shop = unit_price × kWh"
},
"count": {
"type": "integer",
"default": 10,
"maximum": 10000,
"minimum": 1
},
"led_cost": {
"type": "number",
"default": 0,
"maximum": 10000000000,
"minimum": 0
},
"new_watts": {
"type": "number",
"default": 30,
"maximum": 5000,
"minimum": 0
},
"old_watts": {
"type": "number",
"default": 64,
"maximum": 5000,
"minimum": 0
},
"other_kwh": {
"type": "number",
"default": 250,
"maximum": 100000,
"minimum": 0,
"description": "home: monthly use without these lights"
},
"unit_price": {
"type": "number",
"default": 200,
"maximum": 10000,
"minimum": 0,
"description": "shop: KRW per kWh"
},
"hours_per_day": {
"type": "number",
"default": 8,
"maximum": 24,
"minimum": 0
}
}
}내신 등급 (Korean high-school class rank → grade, 5- or 9-grade system). Same code as https://gyesanmate.com/naesin-grade/. Reference: 기준: 고교 내신 상대평가 누적 비율 · 최종 등급은 학교 성적표 기준. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| rank* | integer | |
| ties | integer | 동석차 수(본인 포함) |
| system | string | five = 2025 입학생부터, nine = 2024 이전 |
| students* | integer |
{
"type": "object",
"required": [
"rank",
"students"
],
"properties": {
"rank": {
"type": "integer",
"maximum": 100000,
"minimum": 1
},
"ties": {
"type": "integer",
"default": 1,
"maximum": 100000,
"minimum": 1,
"description": "동석차 수(본인 포함)"
},
"system": {
"enum": [
"five",
"nine"
],
"type": "string",
"default": "five",
"description": "five = 2025 입학생부터, nine = 2024 이전"
},
"students": {
"type": "integer",
"maximum": 100000,
"minimum": 1
}
}
}Philippines LED replacement savings (Meralco rates). Same code as https://kwhmate.com/ph/led-savings/. Reference: Rates: Meralco residential rates, October 2026. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| count | integer | Number of lights |
| led_cost | number | Total cost of the LEDs (optional, for payback) |
| new_watts | number | Watts of one LED |
| old_watts | number | Watts of one old bulb/tube |
| other_kwh | number | Other monthly household use without these lights (kWh) |
| hours_per_day | number |
{
"type": "object",
"required": [],
"properties": {
"count": {
"type": "integer",
"default": 10,
"maximum": 10000,
"minimum": 1,
"description": "Number of lights"
},
"led_cost": {
"type": "number",
"default": 0,
"maximum": 1000000000,
"minimum": 0,
"description": "Total cost of the LEDs (optional, for payback)"
},
"new_watts": {
"type": "number",
"default": 9,
"maximum": 5000,
"minimum": 0,
"description": "Watts of one LED"
},
"old_watts": {
"type": "number",
"default": 60,
"maximum": 5000,
"minimum": 0,
"description": "Watts of one old bulb/tube"
},
"other_kwh": {
"type": "number",
"default": 200,
"maximum": 100000,
"minimum": 0,
"description": "Other monthly household use without these lights (kWh)"
},
"hours_per_day": {
"type": "number",
"default": 8,
"maximum": 24,
"minimum": 0
}
}
}Philippines Meralco bill (this month's residential rate). Same code as https://kwhmate.com/ph/meralco-bill-calculator/. Reference: Source: Meralco rate announcement for October 2026 · lifeline discounts and local taxes not included. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| kwh* | number |
{
"type": "object",
"required": [
"kwh"
],
"properties": {
"kwh": {
"type": "number",
"default": 200,
"maximum": 100000,
"minimum": 0
}
}
}신고 포상금·보상금 (Korean whistleblower rewards: tax evasion, hidden assets, card refusal, public interest, corruption). Same code as https://gyesanmate.com/reward/calculator/. Reference: 확인일 2026-10-12 · 출처: 국세기본법 시행령 제65조의4, 공익신고자 보호법 시행령 제22조, 부패방지권익위법 시행령 제77조 · 참고용 추정치. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| kind | string | evasion = 탈세 제보(탈루세액등), hidden = 은닉재산(징수금액), card = 카드 결제 거부·현금영수증 미발급(거부금액), public = 공익신고, corruption = 부패신고(회복·증대 금액) |
| amount* | number | KRW amount the reward is based on |
{
"type": "object",
"required": [
"amount"
],
"properties": {
"kind": {
"enum": [
"evasion",
"hidden",
"card",
"public",
"corruption"
],
"type": "string",
"default": "evasion",
"description": "evasion = 탈세 제보(탈루세액등), hidden = 은닉재산(징수금액), card = 카드 결제 거부·현금영수증 미발급(거부금액), public = 공익신고, corruption = 부패신고(회복·증대 금액)"
},
"amount": {
"type": "number",
"maximum": 1000000000000000,
"minimum": 0,
"description": "KRW amount the reward is based on"
}
}
}Seoul taxi fare (regular mid-size taxi meter estimate). Same code as https://koreasurvivalkit.com/taxi-fare-calculator/. Reference: Source: Seoul Metropolitan Government, mid-size taxi fares in effect since 1 February 2023 (checked September 2026). Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| km* | number | |
| hour | integer | Departure hour (late-night surcharge) |
| outside_seoul | boolean | |
| slow_traffic_minutes | number | Minutes at 15 km/h or less |
{
"type": "object",
"required": [
"km"
],
"properties": {
"km": {
"type": "number",
"default": 10,
"maximum": 500,
"minimum": 0
},
"hour": {
"type": "integer",
"default": 14,
"maximum": 23,
"minimum": 0,
"description": "Departure hour (late-night surcharge)"
},
"outside_seoul": {
"type": "boolean",
"default": false
},
"slow_traffic_minutes": {
"type": "number",
"default": 10,
"maximum": 600,
"minimum": 0,
"description": "Minutes at 15 km/h or less"
}
}
}학자금대출 상환 (Korean student loan: standard repayment or income-contingent ICL). Same code as https://gyesanmate.com/student-loan-repayment/. Reference: 출처: 교육부고시 제2026-12호(2026학년도 2학기, 시행 2026.7.1) · 상환율은 최신 공지 확인. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| type | string | |
| degree | string | |
| principal | number | |
| defer_years | integer | |
| repay_years | integer | |
| gross_salary | number | icl: annual gross salary |
| rate_percent | number |
{
"type": "object",
"required": [],
"properties": {
"type": {
"enum": [
"general",
"icl"
],
"type": "string",
"default": "general"
},
"degree": {
"enum": [
"undergrad",
"grad"
],
"type": "string",
"default": "undergrad"
},
"principal": {
"type": "number",
"default": 10000000,
"maximum": 10000000000,
"minimum": 1
},
"defer_years": {
"type": "integer",
"default": 2,
"maximum": 30,
"minimum": 0
},
"repay_years": {
"type": "integer",
"default": 10,
"maximum": 30,
"minimum": 1
},
"gross_salary": {
"type": "number",
"default": 35000000,
"maximum": 100000000000,
"minimum": 0,
"description": "icl: annual gross salary"
},
"rate_percent": {
"type": "number",
"default": 1.7,
"maximum": 30,
"minimum": 0
}
}
}수능 표준점수·등급 (Korean CSAT standard score and grade). Same code as https://gyesanmate.com/suneung-score/. Reference: 기준: 2027학년도 수능(한국교육과정평가원) · 실제 등급컷은 해마다 채점 결과로 달라짐. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| sd | number | |
| raw | number | |
| mean | number | |
| subject | string | main = 국어·수학, inquiry = 탐구·제2외국어/한문 |
| percentile | number | |
| english_raw | number |
{
"type": "object",
"required": [],
"properties": {
"sd": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"raw": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"mean": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"subject": {
"enum": [
"main",
"inquiry"
],
"type": "string",
"default": "main",
"description": "main = 국어·수학, inquiry = 탐구·제2외국어/한문"
},
"percentile": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"english_raw": {
"type": "number",
"maximum": 100,
"minimum": 0
}
}
}국내 여행 예산 (Korea domestic trip budget: transport, stay, food, admission ranges). Same code as https://gyesanmate.com/travel-budget/. Reference: 확인일 KTX 2026-10-12·고속버스 2026-10-13 · 출처: 국토교통부 발표(KTX), KOBUS 시간표조회(고속버스) · 결과는 추정치. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| to | string | |
| fare | number | One-way fare per person you checked (empty = built-in fare: KTX Seoul–Busan and Yongsan–Gwangju-Songjeong base fares, and 9 Seoul express-bus routes from KOBUS) |
| from | string | |
| mode | string | |
| toll | number | |
| rooms | integer | |
| car_km | number | |
| nights | integer | |
| people | integer | |
| food_max | number |
Taiwan electricity bill (Taipower residential progressive rates). Same code as https://kwhmate.com/tw/electricity-bill/. Reference: 依據：台灣電力公司 2025年10月1日起實施之住宅用累進電價（2026年電價審議會凍漲）. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| kwh* | number | |
| summer | boolean | June–September rates |
| bimonthly | boolean | two-month bill (brackets doubled) |
{
"type": "object",
"required": [
"kwh"
],
"properties": {
"kwh": {
"type": "number",
"default": 300,
"maximum": 100000,
"minimum": 0
},
"summer": {
"type": "boolean",
"default": false,
"description": "June–September rates"
},
"bimonthly": {
"type": "boolean",
"default": false,
"description": "two-month bill (brackets doubled)"
}
}
}Taiwan LED replacement savings (Taipower non-summer, monthly brackets). Same code as https://kwhmate.com/tw/led-savings/. Reference: 依據：台電住宅用累進電價（非夏月、單月級距）. Returns an estimate with the source and page URL.
| Argument | Type | Description |
|---|---|---|
| count | integer | Number of lights |
| led_cost | number | Total cost of the LEDs (optional, for payback) |
| new_watts | number | Watts of one LED |
| old_watts | number | Watts of one old bulb/tube |
| other_kwh | number | Other monthly household use without these lights (kWh) |
| hours_per_day | number |
{
"type": "object",
"required": [],
"properties": {
"count": {
"type": "integer",
"default": 10,
"maximum": 10000,
"minimum": 1,
"description": "Number of lights"
},
"led_cost": {
"type": "number",
"default": 0,
"maximum": 1000000000,
"minimum": 0,
"description": "Total cost of the LEDs (optional, for payback)"
},
"new_watts": {
"type": "number",
"default": 9,
"maximum": 5000,
"minimum": 0,
"description": "Watts of one LED"
},
"old_watts": {
"type": "number",
"default": 60,
"maximum": 5000,
"minimum": 0,
"description": "Watts of one old bulb/tube"
},
"other_kwh": {
"type": "number",
"default": 300,
"maximum": 100000,
"minimum": 0,
"description": "Other monthly household use without these lights (kWh)"
},
"hours_per_day": {
"type": "number",
"default": 8,
"maximum": 24,
"minimum": 0
}
}
}| food_min | number |
| stay_max | number |
| stay_min | number |
| bus_grade | string | Express bus class (normal / deluxe 우등 / premium 프리미엄) for the built-in Seoul routes |
| fuel_price | number |
| car_km_per_l | number |
| admission_max | number |
| admission_min | number |
{
"type": "object",
"required": [],
"properties": {
"to": {
"enum": [
"부산",
"광주",
"강릉",
"경주",
"전주",
"여수",
"대구",
"대전",
"목포",
"제주",
"기타"
],
"type": "string",
"default": "부산"
},
"fare": {
"type": "number",
"maximum": 10000000,
"minimum": 0,
"description": "One-way fare per person you checked (empty = built-in fare: KTX Seoul–Busan and Yongsan–Gwangju-Songjeong base fares, and 9 Seoul express-bus routes from KOBUS)"
},
"from": {
"enum": [
"서울",
"부산",
"대구",
"대전",
"광주",
"인천",
"기타"
],
"type": "string",
"default": "서울"
},
"mode": {
"enum": [
"ktx",
"bus",
"car",
"other"
],
"type": "string",
"default": "ktx"
},
"toll": {
"type": "number",
"maximum": 1000000,
"minimum": 0
},
"rooms": {
"type": "integer",
"maximum": 30,
"minimum": 1
},
"car_km": {
"type": "number",
"maximum": 5000,
"minimum": 0
},
"nights": {
"type": "integer",
"default": 1,
"maximum": 30,
"minimum": 0
},
"people": {
"type": "integer",
"default": 2,
"maximum": 30,
"minimum": 1
},
"food_max": {
"type": "number",
"maximum": 10000000,
"minimum": 0
},
"food_min": {
"type": "number",
"maximum": 10000000,
"minimum": 0
},
"stay_max": {
"type": "number",
"maximum": 100000000,
"minimum": 0
},
"stay_min": {
"type": "number",
"maximum": 100000000,
"minimum": 0
},
"bus_grade": {
"enum": [
"normal",
"deluxe",
"premium"
],
"type": "string",
"default": "normal",
"description": "Express bus class (normal / deluxe 우등 / premium 프리미엄) for the built-in Seoul routes"
},
"fuel_price": {
"type": "number",
"maximum": 10000,
"minimum": 0
},
"car_km_per_l": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"admission_max": {
"type": "number",
"maximum": 100000000,
"minimum": 0
},
"admission_min": {
"type": "number",
"maximum": 100000000,
"minimum": 0
}
}
}