Free Online Calculators

From BMI to loans, tips to age — instant calculations at your fingertips.

369 Calculators 16 Categories 100% Free

Categories

Business & Retail

38 Calculators

Chemistry & Biology

6 Calculators

Construction & Home

36 Calculators

Cooking & Nutrition

2 Calculators

Date & Time

6 Calculators

Education & Learning

3 Calculators

Electrical & Electronics

9 Calculators

Financial Calculators

82 Calculators

Health & Fitness

80 Calculators

Math Calculators

25 Calculators

Science & Engineering

46 Calculators

Sports & Performance

9 Calculators

Statistics & Probability

11 Calculators

Text Tools

3 Calculators

Travel & Geography

12 Calculators

Unit Converters

2 Calculators

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Battery Life Calculator

#1

Estimates how many hours a battery will last based on battery capacity and device current draw.

Electrical & Electronics 4 variants

Interest Coverage Ratio (ICR) Calculator

Calculates how easily a company can pay interest on its outstanding debt using EBIT and Interest Expense.

Business & Retail 4 variants

Lawn Fertilizer Calculator

Estimate the total pounds of fertilizer required based on lawn size and recommended application rate.

Construction & Home 4 variants

Rent Increase Percentage Calculator

Calculates the percentage increase between an old rent amount and a new rent amount.

Business & Retail 4 variants

Reverse Text

Reverse the order of text.

Text Tools 0 variants

Total Interest Paid Calculator

Calculates the total interest paid over the full term of a loan based on loan amount, monthly payment, and total number of payments.

Financial Calculators 4 variants
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Calculators

369 total
Total Steps Calculator Calculate the total number of steps taken based on distance walked and average s...
Health & Fitness
EN
Work Calculator Calculate mechanical work using the physics formula W = F × d.
Science & Engineering
EN
Quick Ratio (Acid-Test Ratio) Calculator Calculates a company's short-term liquidity using the Quick Ratio formula.
Business & Retail
EN
Debt Payoff Time Calculator Estimate how many months it will take to pay off a debt based on total debt and...
Financial Calculators
EN
Cylinder Volume Calculator Calculates the volume of a right circular cylinder using the standard geometric...
Math Calculators
EN
Ideal Gas Law Volume Calculator Calculates the volume of a gas using the Ideal Gas Law formula (V = nRT / P).
Science & Engineering
EN
Room Heating BTU Calculator Estimates the heating power required for a room based on its volume and desired...
Construction & Home
EN
Real Interest Rate Calculator (Fisher Approximation) Calculates the real interest rate using the Fisher equation approximation: Real...
Financial Calculators
EN
Rainwater Harvesting Potential Calculator Estimates the total annual rainwater that can be collected from a roof based on...
Construction & Home
EN
Parking Cost Calculator Estimate the total parking fee based on the number of hours parked and the hourl...
Travel & Geography
EN
Down Payment Calculator Calculate the required down payment amount based on the home price and down paym...
Financial Calculators
EN
Sales Commission Calculator Calculates the commission earned based on total sales amount and commission rate...
Business & Retail
EN