Runway Calculator

Runway is evaluated from Cash on Hand, Monthly Net Burn Rate and Expected Monthly Revenue Growth. The calculation reports Runway, Runway and Start Fundraising By Month.

Results

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About the Runway Calculator

Runway is treated here as a quantitative relation between Cash on Hand, Monthly Net Burn Rate and Expected Monthly Revenue Growth and Runway, Runway, Start Fundraising By Month and Months to Zero Cash.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
Runway (months) = cash on hand / monthly net burn rate
Start fundraising = runway - 6 months (to preserve negotiating leverage)
Zero-cash date = today + runway months

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

Runway (months) = cash on hand / monthly net burn rate
Start fundraising = runway - 6 months (to preserve negotiating leverage)
Zero-cash date = today + runway months

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Seed-stage startup: $1.8M cash, $120k/month net burn, $15k MoM MRR growth

Inputs

cash_on_hand: 1800000 net_burn_rate: 120000 monthly_revenue_growth: 15000

Runway: 15 months. Runway: 1.25 years. Start Fundraising By Month: 9 months. Months to Zero Cash: 15 months

With Cash on Hand = 1,800,000, Monthly Net Burn Rate = 120,000 and Expected Monthly Revenue Growth = 15,000 as the stated inputs, the result is Runway = 15 months, Runway = 1.25 years and Start Fundraising By Month = 9 months. Each value corresponds to the declared output fields.

Example 2: Series A startup: $4.2M cash, $350k/month net burn, no revenue growth assumed

Inputs

cash_on_hand: 4200000 net_burn_rate: 350000 monthly_revenue_growth: 0

Runway: 12 months. Runway: 1 years. Start Fundraising By Month: 6 months. Months to Zero Cash: 12 months

With Cash on Hand = 4,200,000, Monthly Net Burn Rate = 350,000 and Expected Monthly Revenue Growth = 0 as the stated inputs, the result is Runway = 12 months, Runway = 1 years and Start Fundraising By Month = 6 months. Each value corresponds to the declared output fields.

Example 3: Post-Series B company: $12M cash, $800k/month net burn, growing $100k MRR/month

Inputs

cash_on_hand: 12000000 net_burn_rate: 800000 monthly_revenue_growth: 100000

Runway: 15 months. Runway: 1.25 years. Start Fundraising By Month: 9 months. Months to Zero Cash: 15 months

With Cash on Hand = 12,000,000, Monthly Net Burn Rate = 800,000 and Expected Monthly Revenue Growth = 100,000 as the stated inputs, the result is Runway = 15 months, Runway = 1.25 years and Start Fundraising By Month = 9 months. Each value corresponds to the declared output fields.

Example 4: Bootstrapped company thinking about funding: $450k savings, $35k/month burn, $30k MRR

Inputs

cash_on_hand: 450000 net_burn_rate: 5000 monthly_revenue_growth: 5000

Runway: 90 months. Runway: 7.5 years. Start Fundraising By Month: 84 months. Months to Zero Cash: 90 months

With Cash on Hand = 450,000, Monthly Net Burn Rate = 5,000 and Expected Monthly Revenue Growth = 5,000 as the stated inputs, the result is Runway = 90 months, Runway = 7.5 years and Start Fundraising By Month = 84 months. Each value corresponds to the declared output fields.

Common Use Cases

Calculate how many months of runway a startup has
Determine when to start raising the next funding round
Plan headcount and spending given cash constraints