Free Startup Calculators 2026
Plan costs, runway, ROI, market size, CAC, LTV, funding and equity dilution in under 2 minutes — with 2026 industry benchmarks built in.
Trusted by 10k+ founders · $2.3M+ raised using these numbers · No credit card
Built by IdeaProof · Updated 2026
10 free calculators for the full founder journey — benchmarked against 10K+ validations. No signup · <2 min each · instant PDF.
Plan & Cost
How much will it cost to start, and when do you break even?
Startup Cost Calculator
Total one-time + monthly costs across every category.
- One-time vs recurring
- Category breakdown
- 12-month projection
Break-Even Calculator
Units, revenue and months until you turn profitable.
- Units to break-even
- Revenue threshold
- Timeline view
Startup Runway Calculator
How many months of cash you have at current burn.
- Monthly burn rate
- Runway in months
- Cash-out date
Growth & Unit Economics
Are your customers worth more than they cost to acquire?
ROI Calculator
Return on investment and payback period for any spend.
- ROI %
- Payback period
- Monthly profit
CAC Calculator
Customer Acquisition Cost by channel, benchmarked.
- CAC by channel
- Industry benchmark
- Spend optimization
LTV Calculator
Customer Lifetime Value and the LTV:CAC ratio investors check.
- LTV by segment
- LTV:CAC ratio
- Retention impact
Market & Funding
How big is the opportunity, and how should you fund it?
Market Size Calculator
Estimate market opportunity with top-down + bottom-up.
- TAM
- SAM
- SOM
Funding Calculator
How much to raise, for how long, at what valuation.
- Runway target
- Round size
- Valuation range
Equity Dilution Calculator
Founder dilution across pre-seed → Series B rounds.
- Post-money valuation
- Investor %
- Cap table
Startup Valuation Calculator
Pre-money valuation using comps, revenue and stage.
- Revenue multiple
- Stage benchmarks
- Pre/post money
Compare to your vertical
How to choose the right calculator
Match your goal to the right tool in one row.
| Your goal | Calculator | Output | Open |
|---|---|---|---|
| I need to know what it costs to launch | Startup Cost | Total $ + 12-mo plan | Open |
| I want to know when I make money | Break-Even | Units + months | Open |
| I am running out of cash — when? | Runway | Months left | Open |
| Is this marketing spend worth it? | ROI / CAC | $ per customer + payback | Open |
| What is a customer worth long-term? | LTV | $ LTV + LTV:CAC | Open |
| How big is this market? | Market Size | TAM / SAM / SOM | Open |
| How much should I raise? | Funding | Round size + runway | Open |
| How much equity will I give up? | Equity Dilution | Cap table % | Open |
| What is my startup worth? | Valuation | Pre / post money | Open |
Formulas behind every calculator
Industry-standard, peer-reviewed, no black box.
What "healthy" looks like
Targets investors and operators expect in 2026.
| Metric | SaaS | E-commerce | Marketplace |
|---|---|---|---|
| LTV:CAC ratio | ≥ 3.0 | ≥ 2.5 | ≥ 3.5 |
| CAC payback | < 12 mo | < 6 mo | < 18 mo |
| Gross margin | 70–85% | 30–50% | 60–75% |
| Monthly churn | < 3% (SMB) / < 1% (Ent) | — | < 5% |
| Annual growth (early) | 2–3× | 1.5–2× | 2–3× |
| Burn multiple | < 1.5 | < 2.0 | < 2.0 |
Numbers, or a decision?
One number at a time
Perfect when you already know the question and just need the math. Plug numbers in, get an output, move on.
- Single-metric focus
- No signup, no save
- PDF export
- Industry benchmarks
A go / no-go decision
Combines demand signals, competitors, market sizing and unit economics into one verdict with sources.
- Multi-source demand signals
- Competitor map + pricing
- TAM/SAM/SOM + unit economics
- Go / pivot / kill verdict