Math and Finance

Fast online calculators and converters for math, finance, and everyday numbers.

Date Calculator

Calculate date differences or add and subtract days, weeks, months, and years instantly.
Heat Stress Calculator

Calculate Heat Index, WBGT, and Thermal Work Limit (TWL) to assess heat stress and safety limits for daily life, sports, and industrial work.
Loan & EMI Calculator

Calculate monthly EMI, total payment, and total interest for any loan. View a full amortization schedule broken down month by month.
Millions, Billions & Trillion Converter

Convert large numbers into K, M, B, and T formats instantly or convert abbreviations back to raw numbers.
Percentage Calculator

Free online percentage calculator to instantly calculate percentage increases, decreases, discounts, ratios, margins, and growth values.
Scientific Calculator

Free online scientific calculator with trigonometric functions, logarithms, exponents, powers, and advanced mathematical calculations.
Standard Calculator

Free online calculator for fast, accurate, and secure arithmetic calculations including addition, subtraction, multiplication, and division.