Calculators 31
Age, SIP and FD returns, loans, GST/VAT, units and dates.
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All tools 31
- Unit converterConvert length, weight, volume, area, speed, data and temperature.
- Percentage calculatorWork out percentages, increases and decreases.
- Loan / EMI estimateEstimate the monthly EMI and total interest on a loan.
- Date differenceCount the days, weeks and months between two dates.
- Tip and bill splitAdd a tip and split the bill between people.
- GST / VAT calculatorAdd or remove tax, with CGST/SGST or IGST split.
- GST invoice generatorMake an Indian GST tax invoice: GSTINs checked, CGST/SGST or IGST by place of supply, amount in words, PDF and e-invoice QR.
- GST filing prep (GSTR-1)Turn a set of sales invoices (CSV or JSON) into GSTR-1 section tables — B2B, B2C, exports, nil-rated — with the rows that would mis-file flagged.
- POS billingFast counter billing for a small shop: tap items, see the GST split live, print a receipt, and keep the day's sales and tax.
- Math expression evaluatorFull expressions with functions, powers and constants.
- Age calculatorExact age in years, months and days, plus the next birthday.
- SIP, FD & compound interestSee how a monthly SIP, a lump sum or a fixed deposit grows, with a chart.
- Currency converterConvert between 59 world currencies — dollars to riyals, euros to rupees and every cross rate — with rates saved in the tool.
- BMI and calorie calculatorBody mass index, healthy weight range and daily calorie estimate.
- Discount calculatorSale price and savings after one or two discounts, plus tax.
- Profit margin and markupFind selling price, profit, margin and markup from cost.
- Time duration calculatorAdd or subtract hours, minutes and seconds, or time between two clock times.
- Add days to a dateAdd or subtract days, weeks, months or working days from a date.
- Statistics calculatorMean, median, mode, range, standard deviation and quartiles of a list.
- Fraction calculatorAdd, subtract, multiply and divide fractions and mixed numbers.
- Roman numeral converterConvert numbers to Roman numerals and back (1 to 3,999).
- CAGR and ROI calculatorYearly growth rate and total return between a start and end value.
- Inflation calculatorWhat an amount will cost in future, or is worth today, at a set inflation rate.
- Trip fuel costFuel needed and cost for a trip, split between people.
- Salary converterConvert pay between hourly, daily, weekly, monthly and yearly.
- Running pace calculatorPace, finish time or distance for a run, walk or ride.
- Electricity cost calculatorRunning cost and energy use of an appliance per day, month and year.
- Hijri ↔ Gregorian date converterConvert dates between the Hijri (Umm al-Qura) and Gregorian calendars, both ways. Shows today in both.
- Zakat calculatorZakat on cash, gold, silver, shares and money owed to you, minus debts, with the nisab check.
- End-of-service award (Saudi Arabia)Saudi end-of-service gratuity under Labor Law Articles 84–87, with resignation rules and a breakdown.
- GPA calculatorWeighted grade point average from your courses, grades and credits.