All Calculators

Calculate monthly payment, interest, and amortization.

Estimate monthly loan repayments and total interest.

Calculate car payments and interest rates.

Visualize how your loan is paid off over time.

Project potential returns on your investments.

Plan for your retirement savings goals.

Find your financial independence target with the 4% rule.

How much to save today so compounding alone reaches FIRE.

Smaller portfolio when part-time income covers part of expenses.

Project when you reach a savings target with a year-by-year table.

Trinity Study simulation with inflation-adjusted withdrawals.

Day rate and hourly rate from a target take-home — after tax, expenses, and non-billable time.

Real hourly rate after non-billable hours and project expenses.

Post-project P&L vs your target hourly rate.

% of each invoice to save for quarterly / year-end tax.

Gross and net rental yield on a buy-to-let after voids, fees, and running costs.

Compare HMO room-by-room yield vs single-let on the same property.

Compute SDLT for England & NI — standard, BTL surcharge, or first-time buyer relief.

Profit and ROI on a property flip after refurb, holding, and selling costs.

Convert between hourly, monthly, and annual salary.

Determine how much home you can afford.

Plan your monthly budget using the 50/30/20 rule.

Calculate compound interest with regular contributions and different compounding frequencies.

Plan your 401k retirement savings with employer match.

Calculate payoff time and interest on credit card debt.

Figure out how much to save each month to reach your goal.

Calculate simple and compound interest.

Calculate loan payments at any frequency.

Calculate simple interest using I = Prt.

Estimate federal income tax with 2024 brackets.

Find the interest rate on a loan.

Project savings growth with deposits and interest.

Calculate discounted prices with tax.

Find the sale price or discount percentage.

Calculate true APR including fees.

Calculate return on investment.

Calculate down payment and savings timeline.

Compare current vs refinanced mortgage.

Calculate inflation impact on purchasing power.

Accelerate mortgage payoff with extra payments.

Compare student loan repayment plans.

Create a debt payoff plan.

Calculate personal loan payments with fees.

Calculate present value of future money.

Project the future value of investments.

Calculate certificate of deposit returns.

Calculate your DTI ratio.

Estimate net pay after deductions.

Compare renting vs buying a home.

Calculate home equity loan payments.

Project Roth IRA growth and tax-free income.

Analyze rental property investment returns.

Calculate FHA loan payments with MIP.

Calculate VA loan payments and funding fee.

Calculate HELOC payments and credit line.

Compare Traditional vs Roth IRA.

Calculate required minimum distributions.

Calculate bond price, yield, and duration.

Calculate asset depreciation schedules.

Calculate profit margin and markup.

Calculate monthly car lease payments.

Calculate investment payback period and NPV.

Calculate your Body Mass Index.

Estimate daily calorie needs for weight loss or maintenance.

Estimate your body fat percentage.

Calculate Basal Metabolic Rate.

Find your healthy weight range.

Estimate due date and pregnancy milestones.

Track your most fertile days.

Calculate your Total Daily Energy Expenditure.

Calculate your optimal macronutrient split.

Calculate running pace, time, or distance.

Estimate calories burned during exercise and activities.

Find your target heart rate zones for exercise.

Calculate your daily protein requirements.

Estimate your pregnancy due date.

Determine your healthy weight range.

Track recommended pregnancy weight gain.

Estimate your conception date.

Calculate your one-rep max for any lift.

Calculate your lean body mass.

Calculate your daily carbohydrate needs.

Calculate your daily fat intake needs.

Estimate your blood alcohol content.

Predict your next period and fertile window.

Estimate conception date and fertile window.

Determine your body type classification.

Calculate body surface area using medical formulas.

Calculate glomerular filtration rate for kidney health.

Calculate body fat using Army tape test.

Assess underweight BMI ranges and health risks.

Assess overweight status and health risks.

Full-featured scientific calculator.

Calculate percentages, increases, and decreases.

Add, subtract, multiply, and divide fractions.

Simplify, scale, and compare ratios.

2D/3D distance and midpoint.

Calculate your Grade Point Average.

Generate random numbers within a range.

Calculate sides, angles, area, and perimeter of triangles.

Calculate volume of common 3D shapes.

Calculate area of common 2D shapes.

Calculate standard deviation, variance, and more.

Find mean, median, mode, and range of a data set.

Find the GCD/GCF of two or more numbers.

Find the LCM of two or more numbers.

Comprehensive statistics for any data set.

Convert between standard and scientific notation.

Calculate powers, roots, and exponential expressions.

Perform basic arithmetic operations.

Calculate event and conditional probability.

Find missing sides using the Pythagorean theorem.

Calculate radius, diameter, circumference, and area.

Calculate percent error between values.

Calculate mean, weighted average, and more.

Calculate square roots, cube roots, and nth roots.

Solve quadratic equations and find roots.

Calculate slope and line equation from two points.

Calculate logarithms with any base.

Calculate permutations and combinations.

Calculate z-scores and normal distribution probabilities.

Calculate confidence intervals for means and proportions.

Determine required sample size for studies.

Calculate p-values for hypothesis testing.

Calculate sides, angles, and area of right triangles.

Calculate surface area of 3D shapes.

Convert and calculate in binary.

Convert and calculate in hexadecimal.

Perform matrix operations and calculations.

Find prime factors of any number.

Find all factors and factor pairs.

Identify and generate number sequences.

Calculate radioactive decay and half-life.

Round numbers to any precision.

Arithmetic with very large numbers.

Long division with step-by-step solution.

Calculate age in years, months, and days.

Calculate days between dates or add/subtract time.

Add or subtract hours, minutes, and seconds.

Calculate hours between times.

Calculate duration between times.

Count days between dates.

Calculate work hours and pay.

Convert between time zones.

Find the day for any date.

Find optimal sleep and wake times.

Convert between different units of measurement.

Convert and compare heights.

Convert between weight units.

Convert shoe sizes internationally.

Convert Roman numerals and numbers.

Compare and convert tire sizes.

Calculate concrete in yards and bags.

Calculate area in square feet.

Calculate BTU for heating and cooling.

Calculate stair rise, run, and steps.

Calculate roofing materials and cost.

Calculate tiles needed for a project.

Calculate mulch in yards and bags.

Calculate gravel volume and weight.

Calculate density, mass, or volume.

Calculate mass from force and acceleration.

Calculate wind chill factor.

Calculate heat index feels-like temp.

Calculate dew point temperature.

Calculate voltage drop in wiring.

Calculate voltage, current, resistance.

Calculate HP from torque and RPM.

Decode resistor color bands.

Calculate solution molarity.

Calculate molecular weight of compounds.

Calculate tip and split the bill.

Add, remove, or find sales tax.

Weighted course grade and grade needed.

Trip fuel cost from distance and MPG.

Calculate fuel efficiency and cost.

Calculate speed, distance, or time.

Roll virtual dice with statistics.

Calculate electricity cost and usage.

Calculate trip mileage and reimbursement.

Calculate golf handicap index.

Calculate love compatibility score.

5-year cost-of-ownership comparison: electric vs petrol.

Per-mile cost: home + public charging vs petrol.

Solar payback and 25-year cumulative return.

CO₂e for any flight using DEFRA emission factors.

Calculate IP subnets and ranges.

Calculate download time and bandwidth.

Encode and decode Base64 strings.

Encode and decode URLs.

Generate strong random passwords.

Estimate API cost, compare models, find breakeven volume, and see which clouds host each LLM. Covers 110+ frontier models incl. GPT, Claude, Gemini, DeepSeek, Qwen, GLM, Kimi.