Finance

Cash Runway Calculator

Estimate startup runway and projected cash balance over time.

Last validated: 2026-02-14

Cash Runway Calculator estimates how long cash reserves last given revenue and burn assumptions. It is useful for startup planning, hiring timing, and fundraising preparation. The tool translates monthly cash flows into runway visibility. Use it to model conservative and aggressive spending plans.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Runway Inputs

Estimate cash runway from burn and projected revenue growth.

Runway Result

Estimated runway: 10.0 months

Net burn: $25,000.00/month

Projected depletion month (with growth): 12

Month 1: Revenue $35,000.00 | Balance $225,000.00

Month 2: Revenue $35,700.00 | Balance $200,700.00

Month 3: Revenue $36,414.00 | Balance $177,114.00

Month 4: Revenue $37,142.28 | Balance $154,256.28

Month 5: Revenue $37,885.13 | Balance $132,141.41

Month 6: Revenue $38,642.83 | Balance $110,784.23

Month 7: Revenue $39,415.68 | Balance $90,199.92

Month 8: Revenue $40,204.00 | Balance $70,403.92

Month 9: Revenue $41,008.08 | Balance $51,412.00

Month 10: Revenue $41,828.24 | Balance $33,240.23

Month 11: Revenue $42,664.80 | Balance $15,905.04

Month 12: Revenue $43,518.10 | Balance -$576.86

Month 13: Revenue $44,388.46 | Balance -$16,188.40

Month 14: Revenue $45,276.23 | Balance -$30,912.16

Month 15: Revenue $46,181.76 | Balance -$44,730.41

Month 16: Revenue $47,105.39 | Balance -$57,625.02

Month 17: Revenue $48,047.50 | Balance -$69,577.52

Month 18: Revenue $49,008.45 | Balance -$80,569.07

Month 19: Revenue $49,988.62 | Balance -$90,580.45

Month 20: Revenue $50,988.39 | Balance -$99,592.06

Month 21: Revenue $52,008.16 | Balance -$107,583.90

Month 22: Revenue $53,048.32 | Balance -$114,535.58

Month 23: Revenue $54,109.29 | Balance -$120,426.29

Month 24: Revenue $55,191.47 | Balance -$125,234.81

How to use this tool

Enter current cash, monthly revenue, and monthly expenses.
Run the calculator to estimate months of runway.
Adjust burn assumptions to evaluate contingency plans.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

Cash on hand: 250000.0
Monthly revenue: 35000.0
Monthly expenses: 60000.0
Monthly growth percent: 2.0
Net burn: 25000.0
Runway months: 10.0
Projected runway months: 12
Cash flow positive:

Expected Outputs

Cash on hand: 250000
Monthly revenue: 35000
Monthly expenses: 60000
Monthly growth percent: 2

Interpretation

Cash on hand is 250000.0. Use this as a decision input, not as a standalone conclusion.
Monthly revenue is 35000.0. Use this as a decision input, not as a standalone conclusion.
Monthly expenses is 60000.0. Use this as a decision input, not as a standalone conclusion.
Compare at least one conservative and one aggressive scenario before committing to a target.

Scenario Compare (A vs B)

Use this to compare two input sets and quantify change in key outputs.

Scenario A

Cash on hand

Monthly revenue

Monthly expenses

Monthly growth percent

Net burn

Runway months

Projected runway months

Cash flow positive

Scenario B