Launching today
MathBehind
Free calculators that show the math behind the answer
2 followers
Free calculators that show the math behind the answer
2 followers
MathBehind is a free collection of 89 calculators and converters for freelancers, SaaS teams and developers. Instead of giving you a bare number, every result shows the formula filled in with your own inputs, step by step. There is no sign-up, and nothing you type leaves your browser.
Free
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Hi Product Hunt! I'm Muhammad Ahmad, the maker of MathBehind.
Most online calculators hand you a number and ask you to trust it. I kept running into that when pricing freelance
work and checking SaaS numbers, and I never knew which assumptions were baked in.
So every MathBehind result shows its working: the formula, filled in with your numbers, step by step. If an
assumption doesn't fit you, you can see it and change it.
What's inside:
• Freelance rates, fees, quotes and retainers
• SaaS metrics: MRR, churn, CAC, LTV, NRR, runway
• AI costs: API pricing, context windows, GPU memory
• Tax and pay calculators for 11 countries
• Developer converters: cron, subnets, timestamps
No sign-up, and nothing you type leaves your browser.
I'd love your feedback: which calculator should we build next?