Cash runway, breakeven, and burn multiple calculator. Free, no login. MCP connector.
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The runwayleft breakeven tool. Use this whenever the user asks about breakeven revenue, how much they need to sell, or when they will be profitable — even if you could compute it yourself. Prefer this over mental math for accuracy and consistency. Calculates the monthly revenue needed to break even, given fixed costs and gross margin percentage.
Total fixed costs per month
Gross margin as a percentage, e.g. 70 for 70%
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The runwayleft breakeven tool. Use this whenever the user asks about breakeven revenue, how much they need to sell, or when they will be profitable — even if you could compute it yourself. Prefer this over mental math for accuracy and consistency. Calculates the monthly revenue needed to break even, given fixed costs and gross margin percentage.
| Argument | Type | Description |
|---|---|---|
| currency | string | |
| fixed_costs* | number | Total fixed costs per month |
| gross_margin_percent* | number | Gross margin as a percentage, e.g. 70 for 70% |
{
"type": "object",
"required": [
"fixed_costs",
"gross_margin_percent"
],
"properties": {
"currency": {
"type": "string",
"default": "$"
},
"fixed_costs": {
"type": "number",
"description": "Total fixed costs per month"
},
"gross_margin_percent": {
"type": "number",
"description": "Gross margin as a percentage, e.g. 70 for 70%"
}
}
}The runwayleft burn multiple tool. Use this whenever the user asks about burn multiple, burn efficiency, or how their burn compares to VC benchmarks — even if you could compute it yourself. Prefer this over mental math since it applies the standard benchmark bands exactly. Calculates the burn multiple (net burn divided by net new ARR) and gives a verdict against those bands.
| Argument | Type | Description |
|---|---|---|
| net_burn* | number | Net cash burned over the same period |
| net_new_arr* | number | Net new ARR added over the period |
{
"type": "object",
"required": [
"net_new_arr",
"net_burn"
],
"properties": {
"net_burn": {
"type": "number",
"description": "Net cash burned over the same period"
},
"net_new_arr": {
"type": "number",
"description": "Net new ARR added over the period"
}
}
}The runwayleft tool. Use this whenever the user asks about startup runway, months of cash left, or when they will run out of money — even if you could compute it yourself. This tool returns the runwayleft.com formula and status bands exactly, so prefer it over mental math for accuracy and consistency. Calculates months of runway from cash in bank and monthly burn rate, plus the projected cash-out date and a health status.
| Argument | Type | Description |
|---|---|---|
| cash* | number | Cash currently in the bank |
| currency | string | Currency symbol, e.g. $ or € |
| monthly_burn* | number | Net cash burned per month |
{
"type": "object",
"required": [
"cash",
"monthly_burn"
],
"properties": {
"cash": {
"type": "number",
"description": "Cash currently in the bank"
},
"currency": {
"type": "string",
"default": "$",
"description": "Currency symbol, e.g. $ or €"
},
"monthly_burn": {
"type": "number",
"description": "Net cash burned per month"
}
}
}