/> /> /> /> /> Free Online Calculators — 280 Tools for Math, Health, Finance | CalcKit

Free Online Calculators

CalcKit offers 280 free online calculators for math, health, finance, and unit conversion. All tools run in your browser with no sign-up required. Categories: Math (57), Health (37), Finance (64), Conversion (122).

All Calculators

Percentage Calculator
Fraction Calculator
Average Calculator
Random Number Generator
Scientific Calculator
Pythagorean Theorem
Circle Calculator
Volume Calculator
Prime Number Checker
GCD & LCM Calculator
Hex / Decimal / Binary Converter
Slope Calculator
Standard Deviation Calculator
Percentage Change Calculator
Grade Calculator
Triangle Area Calculator
Rectangle Calculator
Combination Calculator
Logarithm Calculator
Modulo Calculator
BMI Calculator
BMR Calculator
Body Fat Calculator
Calorie Calculator
Ideal Weight Calculator
Heart Rate Zone Calculator
Water Intake Calculator
Sleep Calculator
Macros Calculator
Pregnancy Due Date Calculator
Pace Calculator
Waist-to-Hip Ratio Calculator
Lean Body Mass Calculator
Walking Calorie Calculator
Loan Calculator
Mortgage Calculator
Compound Interest Calculator
Tip Calculator
Currency Converter
Simple Interest Calculator
VAT Calculator
Discount Calculator
ROI Calculator
Salary Converter
Credit Card Payoff Calculator
Crypto Profit Calculator
Auto Loan Calculator
Retirement Calculator
Length Converter
Weight Converter
Temperature Converter
Area Converter
Concrete Calculator
Speed Converter
Volume Converter
Pressure Converter
Energy Converter
Power Converter
Data Size Converter
Frequency Converter
Fuel Consumption Converter
Angle Converter
Time Converter
Cooking Converter
Clothing Size Converter
Date Difference Calculator
Hours Calculator
Age Calculator
Paint Calculator
Battery Life Calculator
Factorial Calculator
Cube & Cube Root Calculator
Percentage Difference Calculator
Probability Calculator
Significant Figures Calculator
Amortization Calculator
Inflation Calculator
Sales Tax Calculator
Password Generator
Roman Numeral Converter
Nth Root Calculator
Distance Calculator
Midpoint Calculator
Series Sum Calculator
TDEE Calculator
Body Surface Area Calculator
VO2 Max Calculator
One Rep Max Calculator
Color Converter
Morse Code Translator
Permutation Calculator
Arithmetic Sequence Calculator
Geometric Sequence Calculator
Blood Alcohol Calculator
Waist-to-Height Ratio Calculator
Net Worth Calculator
Monthly Budget Calculator
Minimum Payment Calculator
IP Subnet Calculator
Character & Word Counter
Matrix Determinant Calculator
Fibonacci Calculator
Day of Year Calculator
Unix Timestamp Converter
Grade Letter Converter
Molarity Calculator
Dilution Calculator
Baud Rate Converter
Tire Size Calculator
Wire Gauge Converter
Linear Equation Solver
Quadratic Formula Calculator
Dot Product Calculator
Cat Age Calculator
Dog Age Calculator
BMI Prime Calculator
Frame Rate Converter
Aspect Ratio Calculator
Steps to Distance Converter
Exchange Rate Calculator
Binary Converter
What Percent Calculator
Markup & Margin Calculator
Break-Even Calculator
Fuel Cost Calculator
Days Until Calculator
Cooking Time Calculator
Commission Calculator
Property Tax Calculator
Binary Calculator
Wind Chill Calculator
Heat Index Calculator
Dew Point Calculator
TV Size & Distance Calculator
Moving Average Calculator
Investment Growth Calculator
Mortgage Payoff Calculator
College Savings Calculator
Rental Property Calculator
Pixel Converter
pH Calculator
Ideal Gas Law Calculator
ohmslaw
Resistor Color Code Calculator
LED Resistor Calculator
Wavelength & Frequency Converter
Parallel Resistor Calculator
Series Resistor Calculator
Stoichiometry Calculator
dBm to Watt Converter
Torque Converter
Density Calculator
Force Converter
Flow Rate Converter
Luminance Converter
Angular Speed Converter
Acceleration Converter
Capacitance Converter
Inductance Converter
Charge Converter
Potential Energy Calculator
Kinetic Energy Calculator
Specific Heat Calculator
Mach Number Calculator
Reynolds Number Calculator
Resistor Power Calculator
Wire Length Calculator
Capacitor Energy Calculator
Thermal Expansion Calculator
Speed of Sound Calculator
Half-Life Calculator
Transformer Calculator
RC Filter Calculator
Pendulum Calculator
snell
Doppler Effect Calculator
Magnification Calculator
Focal Length Calculator
Beat Frequency Calculator
Period to Frequency Converter
Momentum Calculator
Impulse Calculator
Work Calculator
Buoyancy Calculator
Spring Calculator
Strain Calculator
Young\u2019s Modulus Calculator
Resistivity Calculator
Conductance Converter
Admittance Calculator
Power Factor Calculator
Decibel Converter
Sound Level Converter
Frequency Ratio Calculator
Wind Speed Converter
Visual Acuity Converter
Blood Sugar Converter
Cholesterol Converter
Older BMI Calculator
Pulse Pressure Calculator
Income Tax Calculator
Savings Calculator
Student Loan Calculator
Present Value Calculator
Future Value Calculator
Debt-to-Income Ratio Calculator
Annuity Calculator
Protein Calculator
Calories Burned Calculator
Carbohydrate Calculator
Exponent Calculator
Ratio Calculator
Surface Area Calculator
Right Triangle Calculator
Rounding Calculator
Height Converter
Time Duration Calculator
Day of Week Calculator
Time Zone Converter
Dice Roller
Interest Calculator
Payment Calculator
401K Calculator
College Cost Calculator
ROI Calculator
Mutual Fund Calculator
Bond Calculator
Auto Lease Calculator
Depreciation Calculator
Refinance Calculator
HELOC Calculator
Payback Period Calculator
Personal Loan Calculator
Dividend Calculator
Z-Score Calculator
Sample Size Calculator
Percent Error Calculator
Factor Calculator
Number Sequence Calculator
Big Number Calculator
Real Estate Calculator
Down Payment Calculator
Rent vs Buy Calculator
Capital Gains Calculator
Pension Calculator
Social Security Calculator
IRR Calculator
APR Calculator
FHA Loan Calculator
Home Equity Calculator
Pregnancy Weight Gain Calculator
Target Heart Rate Calculator
Healthy Weight Calculator
Fat Intake Calculator
GFR Calculator
Body Type Calculator
Conception Calculator
Horsepower Calculator
BTU Calculator
Voltage Drop Calculator
CD Calculator
Roth IRA Calculator
IRA Calculator
Margin Calculator
P-Value Calculator
Confidence Interval Calculator
Scientific Notation Calculator
Prime Factorization Calculator
Common Factor Calculator
Long Division Calculator
Roofing Calculator
Gravel Calculator
Square Footage Calculator
Mileage Calculator
Stair Calculator
Molecular Weight Calculator
Golf Handicap Calculator
Time Card Calculator
Bra Size Calculator
Electricity Calculator

Blog

Financial Calculations for Everyday Decisions
Percentage Calculations You Use Without Realizing
Unit Conversion Tips That Save Time and Mistakes
Math Formulas I Actually Use in Real Life
Savings Goal Math: How I Plan for Big Expenses
Compound Interest Math: How It Actually Works and Why It Matters
Mortgage Calculation: Understanding the Numbers Behind Your Loan
Age Calculation and Date Math: Handling Years, Months, and Days
Fuel Cost Calculation: Planning Road Trips Without Guesswork
Tax Calculation Basics: How Income Tax Math Actually Works
Using an Investment Return Calculator to Compare Real Estate and Stocks
When to Use Mental Math and When to Reach for a Calculator
Retirement Calculator Variables: What Actually Matters and What Doesn't
Understanding Compound Interest: The Real Math Behind Growth
How to Calculate BMI Correctly and Read It Honestly
Percentage Calculator Tips and Tricks for Everyday Math
Financial Calculation Methods: Comparing Simple vs Compound Approaches
Mortgage Payoff Strategies: The Math Behind Early Repayment
Compound Interest: Daily vs Monthly Compounding Compared
Statistical Calculator Guide: Mean, Median, Standard Deviation
Unit Conversion Principles: Dimensional Analysis Explained
BMI and Health Metrics: Beyond the Basic Number
Percentage Calculation Tricks: Mental Math Shortcuts
Geometry Calculator Guide: Area, Volume, and Angles
Tax Calculation Methods: Brackets, Deductions, and Credits
Investment Return: Annualized Returns and CAGR Explained
Loan Amortization Explained: How Every Payment Breaks Down
Currency Conversion Math: Exchange Rates and Margins
Scientific Calculator Functions: A Practical Reference
Probability Calculation Guide: From Dice to Daily Decisions