All tools
Every TryCalculatingNow calculator and reference, grouped by category. Type to filter — everything runs locally in your browser.
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Grades & GPA
- Final Grade CalculatorFind the grade you need on your final exam.
- What Grade Do I Need on My FinalWork out the final-exam score to hit your target.
- Final Grade FormulaThe formula behind the final grade you need.
- Finals Week PlannerPlan the grades you need across finals week.
- GPA CalculatorCalculate your GPA from letter grades and credits.
- College GPA CalculatorCalculate a college GPA across courses.
- High School GPA CalculatorCalculate a high school GPA.
- Weighted GPA CalculatorCalculate a weighted GPA (honors / AP).
- CGPA to PercentageConvert CGPA to a percentage (CBSE ×9.5 + variants).
- CGPA to Percentage CalculatorCGPA → percentage calculator hub.
- Percentage to CGPAConvert a percentage to CGPA.
- SGPA to CGPACredit-weighted SGPA → cumulative CGPA.
- Marks Percentage CalculatorConvert marks to percentage (out of 600/720).
- Attendance PercentageAttendance % and classes you can bunk above 75%.
- Pass Mark CalculatorScore needed on remaining weight to pass.
- GPA Scale & Letter Grade ChartGPA scale and letter-grade reference chart.
- UK Grade CalculatorFirst / 2:1 / 2:2 from percentage.
- German Grade CalculatorPercentage to German 1.0–5.0 scale.
Percentages
Finance
- Compound InterestGrow savings with compound interest.
- India Tax & Finance ToolkitGST, tax estimate, EMI, SIP, invoice, and rent receipt hub.
- Compound Interest + MonthlyCompound interest with monthly contributions.
- Simple InterestCalculate simple interest.
- Loan / EMI CalculatorEMI, amortization schedule, and CSV export.
- EMI CalculatorMonthly EMI calculator hub.
- Home Loan EligibilityFOIR-style home loan eligibility estimate.
- SIP CalculatorSIP with optional annual step-up %.
- Lumpsum CalculatorLumpsum investment growth estimate.
- FD CalculatorFixed deposit maturity estimate.
- PPF CalculatorPPF corpus estimate from yearly deposits.
- Income Tax Calculator (India)Illustrative old vs new regime tax estimate.
- Discount CalculatorWork out a discount and final price.
- Sales Tax CalculatorAdd sales tax to a price.
- Tip CalculatorSplit a bill and work out the tip.
- Hourly to SalaryConvert hourly wage to yearly salary.
- Salary to HourlyConvert annual salary to hourly rate.
- Overtime Pay CalculatorOvertime at time-and-a-half or custom multiplier.
- VAT CalculatorUK/EU VAT add or remove.
- Inflation CalculatorBuying power across years (illustrative CPI).
- Savings Goal CalculatorMonths or deposit needed for a savings goal.
- Rent Receipt GeneratorPrintable rent receipts for HRA — private in your browser.
- Invoice GeneratorPrintable invoices with line items and tax/GST.
Unit conversion
- Celsius to FahrenheitConvert °C to °F.
- Fahrenheit to CelsiusConvert °F to °C.
- cm to InchesConvert centimeters to inches.
- Inches to cmConvert inches to centimeters.
- Feet to MetersConvert feet to meters.
- Meters to FeetConvert meters to feet.
- km to MilesConvert kilometers to miles.
- Miles to kmConvert miles to kilometers.
- Inches to mmConvert inches to millimeters.
- mm to InchesConvert millimeters to inches.
- kg to lbsConvert kilograms to pounds.
- lbs to kgConvert pounds to kilograms.
- Grams to OuncesConvert grams to ounces.
- Ounces to GramsConvert ounces to grams.
- km/h to mphConvert km/h to mph.
- mph to km/hConvert mph to km/h.
- Unit Conversion ChartCommon unit conversions in one chart.
- MPG CalculatorMPG ↔ L/100km ↔ km/L and trip cost.
- Cups to GramsConvert cups to grams by ingredient density.
Math & everyday
- Average CalculatorCalculate the mean of a set of numbers.
- Ratio CalculatorSimplify and solve ratios.
- Fraction to DecimalConvert a fraction to a decimal.
- Roman Numeral ConverterConvert numbers to and from Roman numerals.
- Age CalculatorCalculate age from a date of birth.
- Days Between DatesCount the days between two dates.
- Hours CalculatorHours between two clock times (timesheet).
- Time CalculatorAdd or subtract days, hours, and minutes.
- BMI CalculatorCalculate Body Mass Index.
Guides
- Lumpsum Calculator — FV ExplainedHow a lumpsum investment future value works — FV = P × (1 + r)^n, a worked example, and how it differs from SIP. Illustrative math only.
- Percentage to CGPA (÷9.5) ExplainedConvert percentage to CGPA with the common CBSE rule CGPA = % ÷ 9.5 — examples, university caveats, and a private browser calculator.
- Simple Interest Formula — Worked ExamplesSimple interest SI = P × R × T ÷ 100 — how it differs from compound interest, month/year time tips, and a private browser calculator.
- Free Invoice Generator Without Uploading Client DataWhy a browser-only invoice template fits freelancers and small businesses — and how to print a PDF without pasting PII to a random site.
- German Grade Scale 1 to 5 ExplainedHow the German 1.0–5.0 grading scale works, what counts as passing, and how percentage-to-grade maps are usually framed.
- MPG to Liters per 100 kmConvert miles per gallon to L/100km and back — formulas, a worked example, and which figure is more intuitive where you drive.
- Pass Mark Calculator: Remaining WeightFind the score you need on the remaining weighted work to hit a pass mark — formula, example, and when it is impossible.
- Rent Receipts for HRA: What to IncludeWhat belongs on a rent receipt for India HRA claims, how to print one privately, and what this template is not.
- Time Calculator — Add and Subtract HoursAdd or subtract hours and minutes in your browser with TryCalculatingNow Time Calculator — numbers stay local.
- Tip and Discount Percentage MathCalculate tips and discounts with clear percent formulas — tip on pre-tax or post-tax, stack discounts carefully, worked examples.
- Inflation Calculator: Buying Power Over TimeMeasure how inflation erodes buying power — formulas for future cost and real value, with a clear worked example. Illustrative only.
- Savings Goal: Months to Hit a TargetEstimate how many months to reach a savings target from a starting balance, contribution, and optional growth rate — illustrative only.
- UK Degree Classification: First & 2:1 ExplainedHow UK first-class and 2:1 boundaries usually work, weighted year averages, and how to explore classification math in-browser.
- FD and PPF Maturity ExplainedHow fixed deposit and PPF maturity amounts are estimated — compounding intuition, tenure, and calculator caveats. Illustrative only.
- Home Loan Eligibility & FOIR ExplainedWhat FOIR means for home loan eligibility, how lenders sketch max EMI, and how to explore affordability math — illustrative only.
- Income Tax: Old vs New Regime Calculator BasicsHow old vs new regime comparisons work at a high level — taxable income ideas, why deductions matter, and calculator limits. Not tax advice.
- Compound Interest: Daily vs MonthlySame nominal annual rate, daily vs monthly compounding — why balances diverge, a simple comparison, and a private scenario calculator.
- Cups to Grams: Flour and SugarConvert cups of flour and sugar to grams with typical densities — why volume ≠ weight, and how to bake more consistently.
- Exam Marks to Percent & Percentage MathTurn scored marks into a percentage, find X% of Y, and measure percent change — privately in your browser with no upload.
- Final Grade Need Over 100%? ExplainedWhen you need more than 100% on the final, the target is mathematically out of reach — here’s what the number means and what to do next.
- GST Calculator: Add and Remove TaxAdd GST to a base amount or extract GST from a tax-inclusive price — formulas for 5%, 12%, 18%, 28% and a worked example.
- Calculate Cumulative GPA Across SemestersCombine prior GPA and new semester credits into a cumulative GPA — quality points, worked example, and a private browser calculator.
- Calculate Semester GPA from LettersAdd up quality points and credits to get semester GPA on a 4.0 scale — weighted vs unweighted, privately in your browser.
- If I Score X on My Final, What's Overall?Reverse final-grade math: plug in a predicted exam score and see your overall course grade — formula, example, private calculator.
- Percent Change: Increase and DecreasePercent change, percent increase, and percent decrease formulas with clear examples — plus related marks-to-percent math in your browser.
- VAT vs GST Calculator BasicsHow VAT and GST percentage math compare — add tax, extract tax from inclusive prices, and when to use which calculator.
- Hourly to Yearly Salary MathConvert hourly wage to weekly, monthly, and yearly pay — hours assumptions, overtime caveats, and a clear worked example.
- Mortgage Payment: Principal & Interest ExplainedHow mortgage payments split into interest and principal, what amortization means, and how to explore scenarios — illustrative only.
- Overtime Pay: Time-and-a-Half MathCalculate time-and-a-half overtime from hourly wage — regular hours, OT hours, and a clear weekly example. Illustrative only.
- Should You Paste GPA Into Online Tools?Why browser-based GPA math is safer than upload forms, what data risk looks like, and how to calculate weighted GPA privately.
- What Final Grade Do I Need?What score you need on a weighted final — formula, worked example, and a private calculator. No upload.
- EMI Amortization & Prepayment IntuitionHow EMI splits into interest and principal over time, what prepayment changes, and how to explore loan scenarios — illustrative only.
- Marks Percentage Calculator: Out of 600 & MoreConvert marks scored out of 600, 500, or any total into a percentage — formula, tables, and when weighted papers differ.
- SIP Calculator with Step-Up ExplainedHow SIP future value works, what a step-up SIP adds, and how to read calculator outputs — illustrative math only, not investment advice.
- What Grade Do I Need? Worked ExampleLearn the final exam grade formula with a clear worked example — current grade, final weight, target — then plug your numbers into a private calculator.
- Attendance Percentage & Bunk Calculator MathCalculate attendance percentage, how many classes you can miss, and classes needed to hit 75% — formulas and examples.
- CGPA to Percentage: CBSE & University ScalesConvert CGPA to percentage with common CBSE and university multipliers — formulas, examples, and why your college rule may differ.
- SGPA to CGPA: How to Combine SemestersTurn semester GPAs into CGPA with credit weights — the formula, a worked multi-semester example, and common mistakes to avoid.
- Weighted vs Unweighted GPA ExplainedClear differences between weighted and unweighted GPA on a 4.0-style scale, with examples for regular, honors, and AP classes.
- Compound Interest + Monthly ContributionsHow compound interest works when you add monthly contributions — formulas, a worked example, and why contribution timing matters more than people think.