About CalcPalace

What we do

We build simple, no-nonsense calculators for the maths people actually search for every day — compound interest, loan and mortgage repayments, BMI and BMR, percentages, unit conversions and more. Each tool gives an instant answer and, just as importantly, shows the formula and a worked example so you understand how the result is produced.

How it works

Every calculator runs as client-side JavaScript inside your browser. There is no "calculate" button to wait on and no server round-trip — results update as you type. Because the maths happens on your device, the numbers you enter are never uploaded, logged or stored by us. Once a page has loaded, most tools even work offline.

Our principles

• Private by design: your inputs stay on your device.
• Free and open access: no sign-up, no paywall, no limits.
• Transparent: every tool shows the formula and a worked example.
• Accurate: conversion factors follow internationally agreed definitions, and results use full floating-point precision, rounded only for display.

How the site is funded

CalcPalace is free to use and is supported by on-page advertising (including Google AdSense). Advertising lets us keep every tool free and account-free. We explain exactly what cookies and advertising partners do — and the choices you have — in our Privacy & Cookie Policy.

A note on accuracy

Our calculators are provided for general information and educational purposes. They are not financial, medical, legal or professional advice. For decisions that matter — a mortgage, a health plan, a tax filing — please confirm figures with a qualified professional.

Get in touch

Spotted a bug, want a new calculator, or have feedback? We'd love to hear from you — visit our contact page.