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JustTools

Free Online Calculators

Accurate calculators for study, money and everyday life — a full scientific calculator with history, percentages with the working shown, GST with the current 5%, 18% and 40% slabs, SGPA and CGPA with percentage conversion, loan EMIs, SIP, PPF, fixed and recurring deposit growth with tax, credit card payoff plans, gross-to-net salary in Luxembourg, a janam kundli maker in Hindi or English, your exact age and exam eligibility, and BMI — with clear breakdowns of how every result is worked out.

14 tools · free · no sign-up

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EMI Calculator

Calculate your loan EMI, total interest and full repayment schedule instantly. See yearly charts, the impact of prepayments and download the schedule.

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BMI Calculator

Free BMI calculator: enter height in feet or cm and weight in kg or lb to see your BMI, WHO or Asian (Indian) category and healthy weight range.

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Age Calculator

Calculate your exact age in years, months and days, the next birthday countdown and age on any date. Check exam age limits as on a cut-off date. Free.

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Scientific Calculator

Free online scientific calculator: trig in degrees or radians, logs, powers, roots, factorial, nCr and nPr, fractions, memory and history. Works on phones.

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FD Calculator

Calculate FD maturity and interest with quarterly compounding, monthly or quarterly payouts, senior citizen rates, tax and TDS, and tenures like 444 days.

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RD Calculator

Calculate RD maturity amount and interest for any monthly deposit, rate and tenure — bank and post office RD with quarterly compounding, tax and a goal planner.

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SIP Calculator

Calculate SIP returns for any monthly investment, rate and period — with yearly step-up, a lump sum, inflation, tax on gains and a goal planner. Free.

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Percentage Calculator

Free percentage calculator: X% of a number, one number as a percent of another, percentage increase or decrease, marks and discounts — with the steps.

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PPF Calculator

Calculate PPF maturity and interest for yearly or monthly deposits at 7.1% or any rate — with 5-year extensions, a year-wise statement and a goal planner.

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Kundli Maker

Make a free janam kundli online by date, time and place of birth: lagna, Chandra and Navamsa charts, planet positions, nakshatra, dasha, in Hindi or English.

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Credit Card Payoff Calculator

See how long it takes to pay off a credit card and how much interest you pay — with 18% GST, a pay-by-date planner and the true cost of minimum payments.

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Luxembourg Salary Calculator

Luxembourg gross to net salary calculator for 2026: income tax in class 1, 1a or 2, social contributions, tax credits, 13th month and employer cost.

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GPA & CGPA Calculator

Calculate SGPA, GPA and CGPA from credits and grades, convert CGPA to percentage with your university’s formula, and find the SGPA you need for a target.

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GST Calculator

GST calculator for India: add or remove GST at 5%, 18% or 40%, split CGST, SGST and IGST, total a multi-item bill and check the 2026 GST rate of any item.

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FAQ

Calculators: common questions

How accurate are the calculators?

Each calculator uses the standard published formula for its topic and shows the working, so you can check every step.

Are the results financial or medical advice?

No. Results are estimates for planning and general information. Confirm important figures with your bank, a qualified adviser or a doctor.

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