Free Online Calculators — Instant Results, No Sign-up
Simple Calc gives you 11 everyday calculators: BMI, ideal weight, BMR, due date, child height, pet age, mortgage prepayment, car insurance, workdays, date difference and age. Region-aware: pick China, US, UK, Japan or EU. All free, no account needed.
All Calculators
BMI Calculator
Free BMI calculator: enter height and weight to get your BMI and classify as und
Use now →Due Date Calculator
Free pregnancy due date calculator using Naegele's rule. Enter your last menstru
Use now →Mortgage Prepayment Calculator
Mortgage prepayment calculator: compare equal-installment vs equal-principal loa
Use now →Pet Age Converter
Convert cat and dog years into human-equivalent age and see the life stage. Uses
Use now →Workday Calculator
Workday calculator that counts weekdays between two dates and subtracts statutor
Use now →Car Insurance Premium Calculator
Calculate how your next year's car-insurance premium changes after a claim, usin
Use now →Child Height Predictor
Predict a child's adult height with the Havlicek formula (parent heights ± 13cm
Use now →Date Difference Calculator
Date difference calculator: enter two dates to get the gap in days, weeks + days
Use now →Ideal Weight Calculator
Free ideal weight calculator: enter height and pick your region (China / WHO Asi
Use now →Age Calculator
Age calculator: enter a date of birth to get your exact age in years, months, da
Use now →BMR & Daily Calorie Calculator
BMR and TDEE calculator using the Mifflin-St Jeor equation. Enter gender, age, h
Use now →