Calculator library
Calculators
Health and finance tools powered by transparent formulas. Calculator results are deterministic and do not use AI. Use the outputs as educational estimates, then review the assumptions before making health or financial decisions.
Health Calculators
Formula-based tools for body composition, metabolism, fitness, pregnancy, and everyday health planning.
Health calculators can help frame body, energy, and activity estimates, but they do not diagnose conditions or replace qualified healthcare guidance.
BMI Calculator
Estimate body mass index from weight and height. Interpret the result as an educational screening estimate, not a diagnosis.
Open calculator →healthBMR Calculator
Estimate daily resting calorie needs. Interpret the result as an educational screening estimate, not a diagnosis.
Open calculator →healthTDEE Calculator
Estimate daily calorie needs after activity level. Interpret the result as an educational screening estimate, not a diagnosis.
Open calculator →healthIdeal Body Weight Calculator
Estimate adult ideal body weight from height and sex.
Open calculator →healthBody Fat Calculator
Estimate body fat percentage with a circumference formula.
Open calculator →healthLean Body Mass Calculator
Estimate lean body mass from height, weight, and sex.
Open calculator →healthWaist-to-Height Ratio Calculator
Compare waist circumference with height. Interpret the result as an educational screening estimate, not a diagnosis.
Open calculator →healthTarget Heart Rate Calculator
Estimate an exercise heart rate range with the Karvonen method.
Open calculator →healthCalories Burned Calculator
Estimate exercise calories from MET, weight, and time.
Open calculator →healthMacronutrient Calculator
Convert calorie targets into macro gram targets.
Open calculator →healthHealthy Weight Range Calculator
Estimate a broad adult weight range associated with the healthy BMI category.
Open calculator →healthWaist-to-Hip Ratio Calculator
Compare waist circumference with hip circumference.
Open calculator →healthRunning Pace Calculator
Convert running distance and time into pace and average speed.
Open calculator →healthOne Rep Max Calculator
Estimate a one-repetition maximum for strength planning.
Open calculator →healthProtein Intake Calculator
Estimate a broad daily protein range in grams.
Open calculator →healthWater Intake Calculator
Estimate a simple daily water range based on body weight. Interpret the result as an educational screening estimate, not a diagnosis.
Open calculator →healthPregnancy Due Date Calculator
Estimate a due date using the conventional 280-day pregnancy calculation.
Open calculator →healthOvulation Calculator
Estimate ovulation timing for a regular menstrual cycle.
Open calculator →healthFertile Window Calculator
Estimate the days around predicted ovulation.
Open calculator →healthPregnancy Weight Gain Calculator
Compare pre-pregnancy BMI with a broad singleton pregnancy weight-gain range.
Open calculator →healthBody Surface Area Calculator
Estimate body surface area in square meters.
Open calculator →healthWeight Loss Percentage Calculator
Measure weight change relative to a starting weight.
Open calculator →healthCalorie Deficit Calculator
Compare a daily calorie deficit with a maintenance estimate.
Open calculator →healthSteps to Distance Calculator
Convert steps into an estimated distance. Interpret the result as an educational screening estimate, not a diagnosis.
Open calculator →healthAge Calculator
Estimate age as of the current date. Interpret the result as an educational screening estimate, not a diagnosis.
Open calculator →Finance Calculators
Planning tools for loans, saving, investing, budgets, income, and business decisions.
Finance calculators can help compare planning scenarios, but they do not include every fee, tax, rate change, product term, or personal circumstance.
Compound Interest Calculator
Project investment growth with compound interest. Compare scenarios using your own assumptions before making financial decisions.
Open calculator →financeLoan Calculator
Estimate monthly payments for a fixed-rate loan. Compare scenarios using your own assumptions before making financial decisions.
Open calculator →financeSavings Goal Calculator
Plan the monthly contribution needed for a target amount. Compare scenarios using your own assumptions before making financial decisions.
Open calculator →financeMortgage Calculator
Estimate payments for a fixed-rate mortgage.
Open calculator →financeInvestment Return Calculator
Estimate total and annualized investment return.
Open calculator →financeSimple Interest Calculator
Estimate interest without compounding.
Open calculator →financeDebt Payoff Calculator
Estimate payoff time and interest for a fixed monthly debt payment.
Open calculator →financeRetirement Savings Calculator
Project retirement savings with monthly contributions.
Open calculator →financeInflation Calculator
Estimate how inflation changes future cost and purchasing power.
Open calculator →financeTip Calculator
Calculate a tip and split the total bill. Compare scenarios using your own assumptions before making financial decisions.
Open calculator →financeAuto Loan Calculator
Estimate payments for a fixed-rate vehicle loan.
Open calculator →financeCredit Card Payoff Calculator
Estimate how long a fixed credit card payment may take to clear a balance.
Open calculator →financeDebt-to-Income Ratio Calculator
Compare monthly debt obligations with gross monthly income.
Open calculator →financeMortgage Affordability Calculator
Estimate a simplified home-purchase range from monthly affordability limits.
Open calculator →financeMortgage Refinance Calculator
Estimate whether a lower-rate refinance may recover closing costs.
Open calculator →financeLoan Amortization Calculator
Inspect one point in a fixed-rate loan amortization schedule.
Open calculator →financeLoan Extra Payment Calculator
Compare a standard loan schedule with an added monthly payment.
Open calculator →financeEmergency Fund Calculator
Set a simple cash-reserve target from essential expenses.
Open calculator →financeNet Worth Calculator
Summarize assets and debts into a net-worth estimate. Compare scenarios using your own assumptions before making financial decisions.
Open calculator →finance50/30/20 Budget Calculator
Create a simple monthly budget allocation from take-home income.
Open calculator →financeHourly to Salary Calculator
Estimate gross salary from hourly pay and work schedule. Compare scenarios using your own assumptions before making financial decisions.
Open calculator →financeAPY Calculator
Estimate effective annual yield from a nominal rate. Compare scenarios using your own assumptions before making financial decisions.
Open calculator →financeCertificate of Deposit Calculator
Project a simple CD balance using a stated APY.
Open calculator →financeBreak-Even Calculator
Estimate the sales volume required to cover fixed and variable costs.
Open calculator →financeStraight-Line Depreciation Calculator
Spread depreciable cost evenly across an asset's useful life.
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