Tools
30 free financial calculators, and every one is an API endpoint
Run them in the browser with no sign-up, or call the same calculation from your product or AI agent with POST /api/v1/tools/{slug}. Every tool works in any currency and shows its working, not just a headline number.
Profitability & pricing
Break-even calculator
Units and revenue you need to cover every fixed cost.
POST /api/v1/tools/break-even-calculator
Gross margin calculator
Gross profit, margin percentage and margin per dollar of revenue.
POST /api/v1/tools/gross-margin-calculator
Markup to margin converter
Convert markup into margin, and price any job from a target margin.
POST /api/v1/tools/markup-to-margin-calculator
Price increase impact
How much volume you can afford to lose after raising prices.
POST /api/v1/tools/price-increase-impact-calculator
Hourly rate calculator
The rate you must charge to hit a target income after costs.
POST /api/v1/tools/hourly-rate-calculator
True cost of an employee
Fully loaded cost per hire, per hour and the revenue needed to cover it.
POST /api/v1/tools/employee-cost-calculator
Growth & SaaS metrics
Customer lifetime value
Gross-margin LTV, expected lifespan and LTV:CAC ratio.
POST /api/v1/tools/customer-lifetime-value-calculator
CAC payback period
How long each acquisition dollar takes to come back.
POST /api/v1/tools/cac-payback-calculator
Churn & retention
Logo churn, gross and net revenue retention, and implied lifespan.
POST /api/v1/tools/churn-and-retention-calculator
Rule of 40
Growth plus profitability, scored against the investor benchmark.
POST /api/v1/tools/rule-of-40-calculator
Cash flow & working capital
Working capital calculator
Net working capital, liquidity ratios and the buffer a buyer expects.
POST /api/v1/tools/working-capital-calculator
Cash conversion cycle
Days your cash is trapped between paying suppliers and being paid.
POST /api/v1/tools/cash-conversion-cycle-calculator
Inventory turnover
Turns per year, days of stock and the cash locked in slow lines.
POST /api/v1/tools/inventory-turnover-calculator
Revenue forecast
Project revenue and profit forward at a chosen growth rate.
POST /api/v1/tools/revenue-forecast-calculator
Investment appraisal
ROI calculator
Simple ROI, annualised ROI and net gain on any investment.
POST /api/v1/tools/roi-calculator
NPV calculator
Today's value of a future cash flow stream, net of the outlay.
POST /api/v1/tools/npv-calculator
IRR calculator
The annual return implied by an investment and its cash flows.
POST /api/v1/tools/irr-calculator
Payback period
How long until an investment repays itself, plain and discounted.
POST /api/v1/tools/payback-period-calculator
CAGR calculator
Smoothed annual growth between any two values.
POST /api/v1/tools/cagr-calculator
Depreciation calculator
Annual depreciation, book value and the difference between methods.
POST /api/v1/tools/depreciation-calculator
Debt & finance
WACC calculator
The blended return your debt and equity funding demands.
POST /api/v1/tools/wacc-calculator
Cost of equity (CAPM)
Risk-free rate, beta, market premium and private-company premiums.
POST /api/v1/tools/cost-of-equity-calculator
Loan repayment calculator
Monthly repayment, total interest and the true cost of a term.
POST /api/v1/tools/loan-repayment-calculator
Lease vs buy
Compare the present-value cost of leasing against purchasing.
POST /api/v1/tools/lease-vs-buy-calculator
Funding & cap table
Exit & transaction
EBITDA normalisation
Turn reported profit into the earnings a buyer will actually pay for.
POST /api/v1/tools/ebitda-normalisation-calculator
Goodwill calculator
The premium above net tangible assets, and whether earnings support it.
POST /api/v1/tools/goodwill-calculator
Earnout calculator
Model upfront cash, earnout tranches and risk-adjusted proceeds.
POST /api/v1/tools/earnout-calculator
Sale proceeds calculator
What actually reaches your bank account after debt, fees and tax.
POST /api/v1/tools/business-sale-proceeds-calculator