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Back-of-the-napkin math, measured to the decimal.

A small kit of fast, honest calculators for SaaS founders and freelancers. Real benchmarks, transparent breakdowns, sensible defaults already filled in — answers before you finish reading the label.

Runs entirely in your browser. / Nothing is sent, nothing is stored.

SaaS metrics 04

Unit economics and growth math for product founders.

LTV : CAC Ratio

Is each customer worth what you pay to win them? Get the ratio against the 3:1 benchmark.

e.g. 3.5 : 1Open

MRR & Growth Rate

Compound your monthly recurring revenue and see where the curve lands in 12 months.

e.g. 1.95× in 1 yrOpen

Churn & Retention

Translate monthly churn into customer lifetime, retained revenue, and the leak rate.

e.g. 113% NRROpen

Runway & Burn

How many months until zero — accounting for the revenue that grows while you spend.

e.g. 11 mo leftOpen

Freelancer money 04

Pricing and take-home math for consultants and indies.

Freelance Rate & Take-home

What an hourly rate actually leaves in your pocket after self-employment tax, fees & expenses.

e.g. keep 66¢ / $Open

Project Quote Builder

Turn an estimate of hours into a defensible fixed-price quote with a risk buffer baked in.

e.g. $16K fixedOpen

Effective Hourly

Count the unbilled hours — admin, sales, scope creep — to find what you truly earn per hour.

e.g. $120 → $72Open

Invoice Late Fee

Apply a fair late fee to an overdue invoice — and know exactly what to put in the contract.

e.g. +$84 / 45dOpen