Free Online Calculators - GPA, Age, Statistics, Finance & Health

GPA calculator from percentage High school GPA calculator Age calculator of child Age calculator of baby Mean median mode calculator Standard deviation calculator Child support calculator Florida VA combined rating calculator Army body fat calculator IVF due date calculator Board and batten calculator Grade calculator with weights Coefficient of variation calculator Decimal to inches calculator Elden Ring build calculator Compound interest calculator with withdrawals GPA calculator from percentage High school GPA calculator Age calculator of child Age calculator of baby Mean median mode calculator Standard deviation calculator Child support calculator Florida VA combined rating calculator Army body fat calculator IVF due date calculator Board and batten calculator Grade calculator with weights Coefficient of variation calculator Decimal to inches calculator Elden Ring build calculator Compound interest calculator with withdrawals

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Browse all 157 →

Ye tools abhi chal rahe hain — click karein aur foran result. Har page mobile pe bhi perfect chalta hai aur offline bhi kaam karta hai jab page ek dafa load ho jaye.

GPA Calculator from Percentage

Percentage ko 4.0 GPA scale aur letter grade me badlein — conversion table ke sath.

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Mean, Median, Mode Calculator

Average, median, mode aur range ek hi click me, poori working steps ke sath.

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Coefficient of Variation Calculator

Mean, standard deviation aur CV% se relative variability nikaalein.

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Decimal to Inches Calculator

0.4375 jaisi decimal ko nearest 1/16, 1/32 ya 1/64 fraction me convert karein.

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Compound Interest with Withdrawals

Monthly withdrawals ke sath final balance, interest aur year-by-year chart.

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All 8 families

Browse calculators by category

Har family ka apna hub page hai jahan us ke saare calculators volume, formula aur example ke sath listed hain. Neeche se seedha apni category chunein.

16 tools

Education

GPA from percentage, high school and middle school GPA, weighted GPA, grade calculator with weights, AP score tools.

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Paycheck, tax and child support calculators illustration

36 tools

Finance

Paycheck and income tax by state, child support calculator, VA disability rating, loans and compound interest.

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Body fat, calories and military PT calculators illustration

25 tools

Health & Fitness

Army body fat, calories burned walking, treadmill and pace calculators, 1RM bench press, military PT tests.

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Age, pregnancy and baby calculators illustration

19 tools

Family & Life

Age calculator for child and baby, IVF due date, conception calculator, pregnancy and baby growth tools.

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Statistics and math calculators illustration

21 tools

Math & Stats

Mean median mode, standard deviation, coefficient of variation, t critical value, triangles, decimal to inches.

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11 tools

Games

Elden Ring build and level calculators, Palworld breeding, CS2 trade up, D&D 5e point buy, fantasy points.

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Home, construction and auto calculators illustration

17 tools

Home & Auto

Board and batten, metal roof and gutter cost, blown-in insulation, concrete, 0-60 time, tire size.

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Astrology, date and everyday calculators illustration

12 tools

Sun moon rising sign, Vedic birth chart, snow day predictor, dog due date, tip and discount tools.

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Statistics & math

Statistics calculators that show the working

Mean, median, mode, standard deviation, coefficient of variation, mean absolute deviation, t and f critical values — har tool step-by-step working dikhata hai, sirf final answer nahi.

Math side pe right triangle and special right triangle solvers, net ionic equation balancer, combined gas law, percentage change aur woodworking ke liye decimal to inches converter.

Sample and population standard deviation
CV% for comparing two data sets
Critical value tables (t, f, z)
Fractions in 1/16, 1/32 and 1/64

Mean, Median, Mode Coefficient of Variation Decimal to Inches All math & stats

Money & benefits

Child support, paycheck and VA calculators, state by state

Child support ek generic formula se nahi banta — har state ke apne guidelines hain. Isliye Florida, California, Indiana, Pennsylvania, Arkansas, Ohio, Virginia aur Nevada ke liye alag pages hain.

Sath hi paycheck aur income tax by state, sales tax aur reverse sales tax, car sales tax, tag title tax, VA combined rating aur VA back pay, loan payments, APR/APY aur savings bonds.

State-specific child support guidelines
Paycheck and take-home pay by state
VA combined rating with dependents
Compound interest with monthly withdrawals

Child Support by State VA Combined Rating Compound Interest All finance

Why CalcKit

Built to be fast, private and actually usable

Koi popup nahi, koi login wall nahi, koi slow load nahi. Bas tool kholiye aur kaam kar lijiye.

Instant answers

Har calculation aap ke browser me hoti hai. Koi server round-trip nahi, koi waiting spinner nahi.

Private by default

Aap ke numbers kabhi upload nahi hote. Page band, data khatam — koi tracking nahi.

Free, no signup

No account, no email, no trial. Site ads se chalti hai, tools hamesha free rehte hain.

Works on any device

iPhone, Android, tablet ya desktop — layout har screen pe same clean rehta hai.

Standard formulas

4.0 GPA scale, sample standard deviation, state child support guidelines, official military tables.

Working shown

Sirf answer nahi — steps, formula aur conversion tables bhi, taake aap verify kar sakein.

Everything in one place

What you can calculate on CalcKit

Har family ka detail — jo calculator aap dhoond rahe hain, us family ke hub page pe mil jayega.

GPA and grade calculators for students

The GPA calculator converts your percentage into a 4.0 scale GPA and a letter grade in one step. Use the high school GPA calculator for a weighted 4.0 scale with honors and AP classes, or the middle school GPA calculator when your school does not use credits.

A grade calculator with weights works out the score you need on the final exam to hit your target grade, and what-if mode shows how one assignment changes the outcome. AP students get score calculators for Chemistry, Statistics, Psychology and Calculus AB.

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GPA Calculator from Percentage High School GPA Calculator14K/mo Middle School GPA Calculator4.5K/mo Grade Calculator with Weights9.7K/mo All education calculators

Age, pregnancy and baby calculators

The age calculator for child and age calculator for baby give exact years, months, weeks and days from a date of birth, plus the next birthday countdown.

For expecting parents there is an IVF due date calculator based on transfer date, a conception calculator that answers “when did I get pregnant”, plus baby percentile and child growth tools.

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All age calculators24K/mo Baby age calculator23K/mo IVF due date calculator13K/mo Conception calculator3.1K/mo

Health, fitness and military calculators

The army body fat calculator and army height and weight calculator follow the current Army standard, while the Air Force PT calculator scores push-ups, sit-ups and the 1.5 mile run.

Fitness tools include one rep max and bench press max, calories burned walking, miles to steps, treadmill calories and half marathon pace.

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Army body fat calculator8.1K/mo Air Force PT calculator3.1K/mo One rep max calculator47K/mo All health calculators

Home, construction and auto calculators

The board and batten calculator works out board count, spacing and material cost per wall, and the metal roof, gutter, tile, epoxy and spray foam pages estimate installed cost by square foot.

Auto tools cover 0-60 time, RPM to gear ratio, tire size difference and 50:1 gas oil mix for two-stroke engines.

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Board and batten calculator4.9K/mo Metal roof cost1.3K/mo 0-60 calculator2K/mo All home & auto calculators

Games and tabletop calculators

The Elden Ring build calculator and level calculator plan stats and runes, Palworld breeding shows parent pairs and inheritance chances, and the CS2 trade up calculator works out expected profit.

Tabletop players get a D&D 5e point buy calculator, and fantasy leagues get points and trade tools.

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Elden Ring build calculator4.7K/mo Palworld breeding8.6K/mo D&D 5e point buy5K/mo All game calculators

How it works

Three steps, no learning curve

Har calculator ka same flow hai — isi liye 157 tools ek hi site pe samajh aate hain.

Find your calculator

Search bar, category card ya footer link — teen tareeqon se seedha us tool pe pahunchein.

Enter your numbers

Fields clearly labelled hain (percentage, dates, weights, state). Koi hidden setting nahi.

Read the result and steps

Final answer ke sath formula aur table bhi milta hai, taake aap khud verify kar sakein.

FAQ

Frequently asked questions

Jo sawal sabse zyada pooche jate hain.

Are all these calculators free to use?

Yes. Every calculator on CalcKit is free and there is no paywall, trial or download. The site is supported by advertising, so you can run as many GPA, age, statistics or finance calculations as you like.

Do I need an account or sign up?

No account, no email and no sign-up. All calculations run in your browser, so your numbers never leave your device unless you choose to share a result.

How does the GPA calculator from percentage work?

The GPA calculator converts any percentage into the standard 4.0 GPA scale and a matching letter grade, then shows the conversion table so you can check each step. It is useful for students applying from percentage-based systems such as Pakistan, India, Bangladesh, Nigeria and the UK.

Do you have GPA and grade calculators for high school and middle school?

Yes. The education section covers a GPA calculator from percentage, a high school GPA calculator, a middle school GPA calculator with and without credits, a weighted GPA calculator, GPA with AP classes, and a grade calculator with weights for final and semester grades.

Do you have calculators for every US state?

Yes. State-specific pages cover child support for Florida, California, Indiana, Pennsylvania, Arkansas, Ohio, Virginia and Nevada, paycheck and income tax for California, New York, Michigan, Washington and New Jersey, plus sales tax and car sales tax by state.

Will these calculators work on my phone?

Yes. Every page is mobile-first and has no external dependencies, so the tools work on iPhone, Android, tablet and desktop, even offline once the page has loaded.

How accurate are the results?

Every tool uses the standard published formula for that calculation — the 4.0 GPA scale, the sample standard deviation formula, state child support guidelines and official military body fat tables. Results are estimates for guidance; for legal, medical or tax decisions always confirm with a professional.

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