CalcNest

The calculator for every decision that matters

Free, fast, and accurate calculators for mortgages, loans, savings, percentages, tips, BMI, and more. No sign-up, no spreadsheets — just clear answers with the math explained.

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Popular Calculators

Mortgage CalculatorEstimate your monthly mortgage payment with taxes and insurance.Open calculatorLoan CalculatorMonthly payment and total interest for any fixed-rate loan.Open calculatorCompound Interest CalculatorProject how savings and investments grow with compounding.Open calculatorSalary to Hourly CalculatorConvert between annual salary and hourly wage in seconds.Open calculatorPercentage CalculatorPercent of a number, percent change, and everything in between.Open calculatorTip CalculatorFigure the tip and split the check — no awkward table math.Open calculatorBMI CalculatorBody Mass Index with US or metric units and category chart.Open calculator

Finance Calculators

Free finance calculators for mortgages, loans, compound interest, credit card payoff, savings goals, and salary conversion. Fast, accurate, and private.

Mortgage CalculatorEstimate your monthly mortgage payment with taxes and insurance.Open calculatorLoan CalculatorMonthly payment and total interest for any fixed-rate loan.Open calculatorCompound Interest CalculatorProject how savings and investments grow with compounding.Open calculatorCredit Card Payoff CalculatorHow long to pay off your balance — and what it will cost.Open calculatorSavings Goal CalculatorExactly how much to save each month to hit your goal.Open calculatorSalary to Hourly CalculatorConvert between annual salary and hourly wage in seconds.Open calculator

Everyday Calculators

Handy everyday calculators for percentages, restaurant tips, sale discounts, and exact age. Quick answers to the math questions that come up every day.

Percentage CalculatorPercent of a number, percent change, and everything in between.Open calculatorTip CalculatorFigure the tip and split the check — no awkward table math.Open calculatorDiscount CalculatorThe real price after the discount — and what you saved.Open calculatorAge CalculatorYour exact age — down to the day — plus a birthday countdown.Open calculator

Health Calculators

Free health calculators including BMI and daily calorie needs using the Mifflin-St Jeor equation. Understand your numbers and set realistic goals.

BMI CalculatorBody Mass Index with US or metric units and category chart.Open calculatorCalorie CalculatorDaily calories to maintain, lose, or gain weight.Open calculator

Why CalcNest?

Instant answers

Results update as you type — no waiting, no page reloads, no sign-up walls.

Accurate formulas

Every tool uses the standard, industry-accepted formula, explained in plain English below the calculator.

Private by design

All calculations run in your browser. Nothing you enter is ever sent to a server or stored.

Built for your phone

Big touch-friendly inputs and readable results, whether you're at your desk or in the checkout line.