CalcProMaster
1200+ free calculators that show every formula and step
A free library of 1200+ online calculators - finance (EMI, mortgage, tax), health (BMI, TDEE), math, construction and more. Every tool shows the exact formula, a step-by-step derivation, and its assumptions, with a public QA dashboard. No signup, all client-side, works offline.
Features
1200+ calculators across finance, health, math, business, construction
Every tool shows the exact formula plus step-by-step derivation
Assumptions documented for every calculator
Public QA dashboard verifies the math
100% client-side - works offline, no signup, no tracking
Use Cases
Plan loan EMI and mortgage payments before talking to a bank
Estimate taxes and take-home salary for job offers in 7 countries
Track BMI, TDEE, calories and macros for fitness goals
Estimate construction materials and costs before buying
Check homework math with a visible, verifiable solution
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