19 FREE CALCULATOR TOOLS
Solve everyday number problems with focused calculators for money, school, health estimates, dates, measurements, and work.
Each Orenvu calculator explains the result and the inputs behind it. You can estimate payments, compare percentages, convert measurements, plan savings, calculate grades, and check date ranges without downloading software or creating an account.
Open any tool below and start immediately.
Find the monthly sales needed to cover fixed costs and reach a profit target. Enter price and variable costs for a free, private break-even calculation.
Use break-even calculator CalculatorEstimate credit-weighted GPA on a 4.0 scale. Enter valid grade points and credits, add or remove courses, and see quality points with clear input errors.
Use gpa calculator CalculatorConvert Celsius to Fahrenheit or Fahrenheit to Celsius instantly. Enter any temperature and get an accurate result in both directions.
Use celsius to fahrenheit converter CalculatorEstimate monthly mortgage principal and interest plus property taxes, homeowners insurance, mortgage insurance and HOA dues. See a clear housing-cost breakdown.
Use mortgage calculator CalculatorEstimate daily maintenance calories, BMR and a gentle weight-loss target using age, sex, weight, height and activity level.
Use calorie calculator CalculatorConvert USD, EUR, GBP, PKR and more with dated Frankfurter reference rates. See the rate date, retry failures and avoid stale or fallback conversions.
Use currency converter CalculatorEstimate gross pay, taxes and take-home pay per paycheck from annual salary, pay frequency, tax rate and deductions.
Use paycheck calculator CalculatorCalculate gross profit, margin and markup from sale price and cost. Handles losses and zero denominators clearly, with display currencies including USD and PKR.
Use margin calculator CalculatorCalculate a percentage of a number, one value as a percent of another, or percentage increase and decrease with validated denominators and clear formulas.
Use percentage calculator CalculatorEstimate hourly gross pay from annual earnings, hours and working weeks. Compare working-week earnings with calendar averages and choose a display currency.
Use salary to hourly calculator CalculatorCalculate your exact age in years, months and days from your date of birth. See total days lived and the countdown to your next birthday.
Use age calculator CalculatorCalculate adult BMI from height and weight in metric or imperial units. See the standard BMI category and a healthy-weight reference range.
Use bmi calculator CalculatorCalculate a points-based test grade, example letter grade and additional points to a target. Supports decimal points and extra credit with input validation.
Use grade calculator CalculatorCalculate fixed monthly loan payments, total repayment and interest from your loan amount, annual interest rate and term. Supports zero-interest loans.
Use loan calculator CalculatorProject compound interest with monthly deposits, beginning- or end-of-month timing, and a chosen annual rate. See contributions and estimated growth or loss.
Use compound interest calculator CalculatorCalculate a restaurant tip, total bill and amount per person. Choose any tip percentage and split the payment instantly.
Use tip calculator CalculatorCount elapsed days, calendar days and exact Monday–Friday weekdays between two dates. Includes both dates in the weekday count; excludes holiday adjustments.
Use date difference calculator CalculatorConvert length, weight and US liquid volume with up to 12 significant digits. Calculate miles to kilometers, pounds to kilograms and US gallons to liters.
Use unit converter CalculatorConvert times between Pakistan, New York, London, Dubai and other cities. Accounts for daylight saving and flags skipped or repeated hours.
Use time zone converterYes. Every calculator is free to open and use without an account.
Calculations run in your browser. Orenvu does not require you to submit personal information.
No. They are educational estimates and should not replace advice from a qualified professional.