All tools

ROI Calculator

Calculate return on investment and annualized return from initial and final value.

Calculators272 uses

Height Calculator

Estimate a child's adult height from both parents' heights.

Calculators271 uses

Income Tax Calculator

Estimate US federal income tax owed using simplified 2024 tax brackets.

Calculators268 uses

Interest Rate Calculator

Solve for the interest rate given principal, final amount and time.

Calculators266 uses

Hourly to Salary Calculator

Convert hourly wage to weekly, monthly and yearly income — or reverse.

Calculators260 uses

Grade Calculator

Calculate your weighted overall grade from assignment scores and weights.

Calculators257 uses

Case Converter

Convert text to UPPERCASE, lowercase, Title Case and more.

Text Tools256 uses

Bra Size Calculator

Find your bra size from band and bust measurements.

Calculators255 uses

One Rep Max Calculator

Estimate your one-rep max from a weight and rep count using the Epley formula.

Calculators254 uses

Lease Calculator

Estimate monthly car lease payments from price, residual value and money factor.

Calculators253 uses

Binary Calculator

Add, subtract, multiply or divide two binary numbers.

Calculators251 uses

Age Calculator

Find your exact age in years, months and days from your birth date.

Calculators250 uses

HTML Viewer & Live Preview

Paste HTML and see it rendered live in a sandboxed preview.

Developer Tools247 uses

Macro Calculator

Calculate daily protein, carb and fat targets from your calorie goal.

Calculators242 uses

Time Calculator (Add/Subtract)

Add or subtract two durations in hours, minutes and seconds.

Calculators237 uses