About CalcPrime
CalcPrime is a collection of 40 free calculators for money, health, maths and everyday life. Our goal is simple: give accurate answers quickly, explain how they were worked out, and respect your privacy.
Private by design
Every calculation runs entirely in your browser or in the Android app on your device. We do not ask you to sign up, and the numbers you type are never sent to a server.
Accuracy
Calculators use standard published formulas — for example Mifflin-St Jeor for calorie needs and the standard amortization formula for loans. Tax calculators use the 2026 tables for Australia, Sri Lanka and the United States and are reviewed each financial year. Results are estimates and are not professional advice.
Who we are
Project owner: Shamath Udakara.
Designed and developed by Shamath Udakara – ICT ASYST PTY LTD — ictasyst.com.au.