PlanetToolbox
Online Calculators
Finance, loan, business, health, work, percentage, unit, budget, savings, retirement, and everyday calculators for practical planning questions.
Calculator categories
Calculator pages are grouped by the user problem they solve, so loan, business, pay, health, math, and conversion tools are easier to scan on desktop and mobile.
Focused calculator pages
These focused calculator pages answer common pay and percentage searches directly, while still using the same underlying production calculators.
Pay conversion pages
Compare gross pay from hourly, salary, wage, and pay-period perspectives without changing calculators.
Hourly to Salary Calculator
Convert hourly pay to annual salary using weekly hours, working weeks, PTO, holidays, unpaid days, and pay frequency.
Annual Salary to Hourly Calculator
Convert annual salary to hourly pay using working hours, PTO, holidays, unpaid time, and pay-period assumptions.
Hourly Wage Calculator
Estimate hourly wage equivalents, annualized hourly pay, pay-period gross pay, and effective work hours.
Gross Pay Calculator
Calculate gross pay by pay period and compare annual, monthly, semi-monthly, biweekly, weekly, and daily gross pay.
Percentage formula pages
Start with the percentage formula that matches the question: percent of, change, increase, decrease, points, or fractions.
Percent of a Number Calculator
Calculate what percent of a number equals, with the decimal form, formula, and step-by-step percentage result.
Percentage Change Calculator
Calculate percent change from an old value to a new value and see whether the result is an increase or decrease.
Percentage Increase Calculator
Calculate a percentage increase from a starting value and percent rate to find the new increased amount.
Percentage Decrease Calculator
Calculate a percentage decrease from a starting value and percent rate to find the new reduced amount.
Percentage Point Calculator
Calculate the percentage-point difference between two percentages and avoid confusing points with percent change.
Fraction to Percent Calculator
Convert a fraction to a percent and see the decimal, percentage result, and calculation steps.
What Percent Calculator
Calculate what percent one number is of another number, with the formula and result details.
Finance and Loans
Payment, interest, debt, retirement, budget, savings, and affordability calculators.
Mortgage Calculator
Estimate mortgage payments, taxes, insurance, PMI, extra payments, payoff timing, and amortization.
Personal Loan Calculator
Estimate personal loan payments, origination fees, interest, payoff timing, and amortization.
Auto Loan Calculator
Estimate auto loan payments with down payment, trade-in, taxes, fees, extra payments, and amortization.
Interest Rate Calculator
Solve an implied interest rate from a loan payment, simple interest amount, or compound return target.
Compound Interest Calculator
Estimate compound interest with principal, recurring contributions, compounding frequency, and inflation adjustment.
Investment Growth Calculator
Project investment growth with contributions, expected return, fees, tax drag, contribution increases, and inflation.
Retirement Calculator
Estimate retirement savings, target nest egg, projected gap or surplus, and required monthly contribution.
Credit Card Payoff Calculator
Estimate how long it will take to pay off a credit card balance and how much interest you may pay.
Debt Snowball Calculator
Build a debt payoff plan using the snowball or avalanche method with minimum payments and extra monthly cash.
Affordability Calculator
Estimate a home purchase budget from income, debts, down payment, mortgage rate, taxes, insurance, HOA, and DTI.
Budget Calculator
Build a monthly budget with income, needs, wants, savings, expenses, monthly surplus, and annual surplus.
Savings Goal Calculator
Calculate months to a savings goal, required monthly savings, projected value, remaining amount, and interest earned.
Travel Budget Calculator
Estimate a trip budget with travelers, nights, flights, lodging, food, transportation, activities, fixed costs, and buffer.
Business and Commerce
Pricing, margin, markup, discount, tax, commission, break-even, and cost calculators.
Profit Margin Calculator
Calculate gross profit, net profit, profit margin, markup, profit per unit, and target revenue from business costs.
Markup Calculator
Calculate selling price, markup amount, total revenue, gross profit, and margin rate from cost and markup inputs.
Discount Calculator
Calculate sale price, discount amount, savings percentage, tax, subtotal, and final total after a discount.
Sales Tax Calculator
Calculate sales tax from a basic percentage, including tax-added and tax-included modes.
Commission Calculator
Calculate sales commission, accelerator commission, quota attainment, total pay, and pay after draw.
Break-even Calculator
Calculate break-even units, break-even revenue, contribution margin, target profit units, and margin of safety.
Tip Calculator
Calculate a tip amount, tax, total bill, service fee, and per-person split for meals and shared expenses.
Meal Cost Calculator
Calculate recipe cost, adjusted batch cost, cost per serving, suggested price per serving, and total suggested revenue.
Work and Pay
Gross pay, hourly pay, overtime, PTO, work hours, shift scheduling, and freelance rates.
Salary to Hourly Calculator
Convert salary to hourly pay, hourly pay to annual salary, and compare weekly, biweekly, monthly, and yearly gross pay.
After-Tax Income Calculator
Estimate take-home pay after 2026 U.S. federal income tax, FICA, and user-entered state or local tax rates.
Overtime Pay Calculator
Calculate regular pay, overtime pay, double-time pay, total hours, and gross pay from hourly wage inputs.
PTO / Vacation Calculator
Estimate accrued PTO, carryover vacation time, used days, planned days, remaining days, and remaining hours.
Work Hours Calculator
Calculate net daily, weekly, biweekly, monthly, and annual work hours from shift times, breaks, and days worked.
Shift Schedule Calculator
Build a repeating work and off-day schedule from a start date, work days, off days, shift length, and cycle count.
Freelance Rate Calculator
Calculate a freelance hourly rate, day rate, weekly revenue target, and annual revenue target from income and expense assumptions.
Health and Fitness
Body, nutrition, hydration, weight, protein, calorie, macro, and activity calculators.
BMI Calculator
Calculate body mass index, BMI category, and estimated healthy weight range from metric or U.S. units.
Body Fat Calculator
Estimate adult body fat percentage, fat mass, lean mass, and a general fitness category using circumference measurements.
Calorie Needs Calculator
Estimate BMR, maintenance calories, goal calories, activity multiplier, and weekly weight-change planning targets.
Macro Calculator
Calculate daily carbohydrate, protein, and fat grams from calories and macro percentages, with fiber and saturated fat planning targets.
Water Intake Calculator
Estimate daily total water, beverage water, cups, common bottle equivalents, and reference adequate intake values.
Ideal Weight Calculator
Estimate adult ideal weight using common height-based formulas, frame-size adjustment, and a BMI-based healthy weight range.
Protein Intake Calculator
Calculate daily protein grams, protein per meal, calories from protein, grams per body weight, and RDA baseline.
Steps to Calories Calculator
Convert steps into estimated calories burned, distance, duration, stride length, and steps per mile using height, weight, and pace.
Math and Percentages
Percentage, percent-of, ratio, fraction, age, and electrical calculation utilities.
Percentage Calculator
Solve common percentage problems, percent change, increases, decreases, and percentage point differences.
X% of Y Calculator
Quickly calculate what X percent of Y equals, with the decimal form, formula, and calculation step.
Ratio / Fraction Calculator
Simplify fractions, convert ratios to decimals and percents, scale ratios, and split a target total by ratio parts.
Age Calculator
Calculate exact age in years, months, days, total time lived, and days until the next birthday.
Ohm's Law Calculator
Calculate voltage, current, resistance, and power from any two known circuit values.
Unit and Color Converters
Measurement, speed, temperature, color, and everyday conversion tools.