Calculator Tools — Free Online Calculator Utilities
Browse our full collection of free online Calculator tools. Everything runs right in your browser — fast, private, and completely free, with no signup or installation required.
Age Calculator
Calculate exact age in years, months, days from any date of birth.
BMI Calculator
Calculate your Body Mass Index in metric or imperial units.
Percentage Calculator
Calculate percentages — what is X% of Y, X is what % of Y, and more.
50/30/20 Budget Calculator
Allocate your income across needs, wants, and savings with the 50/30/20 rule.
Simple Calculator
A clean, fast 4-function calculator for everyday math.
Scientific Calculator
Trig, logs, powers, factorials and more — all in your browser.
Tip & Bill Splitter
Calculate tip and split the bill across any number of people.
GST / Tax Calculator
Add or remove GST/sales tax from any amount.
Love Compatibility Calculator
Just-for-fun compatibility score for two names.
Grade & GPA Calculator
Compute weighted course grades and overall GPA on a 4.0 scale.
Discount Price Calculator
Calculate the final price and savings from a percentage discount.
Daily Calorie Calculator
Estimate your daily calorie needs based on age, gender, and activity.
Sleep Cycle Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles.
Retirement Savings Calculator
Project your retirement savings with monthly contributions and returns.
Fuel Cost Calculator
Fuel Cost Calculator — fast, free, runs entirely in your browser.
Electricity Bill Calculator
Electricity Bill Calculator — fast, free, runs entirely in your browser.
Inflation Calculator
Inflation Calculator — fast, free, runs entirely in your browser.
Compound Interest Calculator
Compound Interest Calculator — fast, free, runs entirely in your browser.
Loan EMI Calculator
Loan EMI Calculator — fast, free, runs entirely in your browser.
Mortgage Calculator
Mortgage Calculator — fast, free, runs entirely in your browser.
Investment Return Calculator
Investment Return Calculator — fast, free, runs entirely in your browser.
Tax Bracket Calculator
Tax Bracket Calculator — fast, free, runs entirely in your browser.
Net Worth Calculator
Net Worth Calculator — fast, free, runs entirely in your browser.
Matrix Calculator
Matrix Calculator — fast, free, runs entirely in your browser.
Prime Number Checker
Prime Number Checker — fast, free, runs entirely in your browser.
LCM & GCF Calculator
LCM & GCF Calculator — fast, free, runs entirely in your browser.
Fraction Simplifier
Fraction Simplifier — fast, free, runs entirely in your browser.
Statistics Calculator
Statistics Calculator — fast, free, runs entirely in your browser.
Fibonacci Number Generator
Fibonacci Number Generator — fast, free, runs entirely in your browser.