Calculate, convert, generate, format &amp; validate.

Framingham Risk Calculator

Calculate the classic Framingham general cardiovascular disease risk score from age, cholesterol, blood pressure, and smoking status to estimate 10-year risk.

Ponderal Index Calculator

Calculate your Ponderal Index (weight divided by height cubed) — a height-independent alternative to BMI for assessing body corpulence instantly.

Estimate plasma volume from height, weight, sex, and hematocrit using Nadler's formula. A standard reference calculation, not a clinical planning tool.

Plasma Volume Calculator

marketing

Breakeven ROAS Calculator

Calculate your breakeven ROAS instantly. Enter gross margin and target profit margin to find the minimum Return on Ad Spend needed for a profitable campaign.

Score a simplified 6-question self-check about substance use consequences. A quick self-reflection tool, not a diagnosis of substance use disorder.

Addiction Calculator

ANC Calculator (Absolute Neutrophil Count)

Calculate absolute neutrophil count (ANC) from total white blood cell count, neutrophil percentage, and band percentage. A standard lab reference calculation.

Sodium in Salt Calculator

Convert table salt (NaCl) grams to sodium milligrams and back, and compare your intake against the recommended daily sodium limit instantly.

everyday

Tile Calculator

Calculate tiles needed for any room with custom tile size, wastage allowance, and box count. Enter room dimensions to get exact quantities instantly.

construction

Thinset Calculator

Calculate how many 50 lb bags of thinset mortar you need to set tile. Enter tile area, trowel coverage rate, and wastage to get the exact bag count.

investment

LTCG Tax Calculator

Calculate Long Term Capital Gains tax on equity and mutual funds for FY 2025-26. Includes 12.5% rate, ₹1.25 lakh exemption, surcharge, and cess.

loan

Home Insurance Calculator

Estimate your annual homeowners insurance premium based on dwelling coverage, home age, deductible, and location risk. Free US calculator online.

Maintenance Calorie Calculator

Find the exact calories you need to maintain your current weight, with an optional body-fat-aware Katch-McArdle formula and a per-meal calorie breakdown.

generator

Fake Email Generator

Generate realistic fake email addresses for testing, prototyping, and seeding databases. Choose domain style and batch size. Runs entirely in your browser.

Browse Calculators

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Health

Calculate BMI, daily calories, body fat percentage, and ideal weight

256 calculators

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Estimate materials, areas, volumes, and costs for building projects

134 calculators

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Chemistry

Solve molar mass, concentration, pH, stoichiometry, and chemical equations

106 calculators

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Fuel cost, electricity bill, BMI, tip, and much more

53 calculators

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Marketing

CPM, ROAS, engagement rate, CLV, CAC, and campaign ROI

52 calculators

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Finance & Investment

Compound interest, 401(k), retirement, CAGR, and SIP growth

48 calculators

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Ecology

Calculate carbon footprint, biodiversity indices, and environmental impact

34 calculators

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Loan

Calculate mortgage, auto, and personal loan payments instantly

28 calculators

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Math

Solve percentage, ratio, average, and common number problems instantly

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Tax

Calculate US federal tax, UK take-home pay, and India income tax

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Physics

Solve mechanics, optics, thermodynamics, and electrical circuit problems

20 calculators

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Sports

Calculate pace, split times, training zones, and athletic performance metrics

14 calculators

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Statistics

Compute mean, median, standard deviation, probability, and regression

14 calculators

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Biology

Calculate genetics, ecology, population growth, and biological metrics

12 calculators

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Food

Calculate calories, nutrition, recipe scaling, and cooking conversions

12 calculators

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Text

Word count, reading time, byte size, and text tools

3 calculators

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Science

Convert angles, frequency, density, and other scientific measurement units

68 converters

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Data & Digital

Convert bits, bytes, KB, MB, GB, and transfer rates

44 converters

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Convert cooking measures, shoe sizes, clothing sizes, and Roman numerals

25 converters

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Measurement

Convert length, weight, area, volume, and temperature across systems

18 converters

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Numbers

Convert between number bases, Indian notation, and Roman numerals

7 converters

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Time & Speed

Convert time durations, speed, and vehicle fuel efficiency units

7 converters

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Energy & Power

Convert energy, power, pressure, force, torque, and work units

4 converters

Browse Generators

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Random name pickers, decision helpers, and everyday quick generators

22 generators

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Developer Tools

Generate UUIDs, hashes, QR codes, and fake test data

21 generators

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Design

Generate colour palettes, CSS gradients, and visual design assets

6 generators

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Security

Generate strong passwords, PINs, and cryptographically secure random tokens

6 generators

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Text & Content

Generate lorem ipsum, placeholder text, and random word content

6 generators

Browse Formatters

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Code

Beautify and reformat JSON, SQL, CSS, and HTML code

19 formatters

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Text

Convert case, clean up whitespace, and tidy your text

13 formatters

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Format phone numbers, addresses, and everyday text into consistent layouts

8 formatters

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Data

Reformat and prettify CSV, XML, and YAML data files

7 formatters

Browse Validators

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Data

Validate emails, URLs, JSON structures, and regex patterns online

24 validators

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Finance & Global IDs

PAN, GST, IBAN, VAT, SSN, IFSC, and UPI ID validation

15 validators

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Security

Check password strength and validate credit card numbers instantly

8 validators

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Validate ZIP codes, pincodes, and vehicle registration formats instantly

7 validators

Articles

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Guides(160)How-To(92)Comparisons(65)Best-Of(44)

HOW-TO

How to Calculate Calories for Weight Loss

Learn how to calculate your daily calorie target for weight loss — using TDEE, a 500-calorie deficit…

Molecular & Cellular Biology Calculators: DNA, Metabolism & Population Growth

Work through GC content, DNA/RNA molecular weight, ATP yield, photosynthesis rate, respiratory quoti…

Pregnancy Due Dates & Fertility Tracking: A Complete Toolkit

Estimate your due date, track gestational age, and understand hCG, Bishop score, and fetal weight pe…

Mental Health Screening & Recovery Tracking: A Step-by-Step Guide

Walk through PHQ-2, GAD-7, and Fagerstrom screening calculators step by step — educational tools, no…

HOW-TO

How to Read Your Natural Gas Bill (Therms vs CCF)

Understand the CCF and therm units on your natural gas bill, how they relate, and how to convert you…

Stud to Siding: Framing a House by the Numbers

Order the right amount of framing lumber, drywall, brick, and siding for a build — a step-by-step ma…

HOW-TO

How to Calculate Your UK Take-Home Pay

A step-by-step guide to working out your net UK salary after Income Tax, National Insurance, pension…

🇮🇳 India(3)🇺🇸 United States(2)🇬🇧 United Kingdom(1)

Blood Cell Count & Ratio Calculators: A Lab Values Guide

Understand absolute eosinophil, lymphocyte, and neutrophil counts, NLR, the A/G ratio, and the Mentz…

Rates & Tax Reference Guides

INDIA

India EPF Interest Rate — Current & Historical

Current EPFO-declared EPF interest rate for FY 2025-26, how it's split between employee and employer…

INDIA

India GST Rates by Category

India's GST slabs explained by category — 0%, 5%, 12%, 18%, and 28% rates with examples of what fall…

INDIA

India Income Tax Slabs — Old vs New Regime

Current India income tax slabs for both Old and New Tax Regimes, FY 2026-27 — rates, standard deduct…

UNITED STATES

US Federal Income Tax Brackets

2024 IRS federal income tax brackets by filing status, plus standard deduction amounts. See exactly …

UNITED STATES

US Retirement Account Contribution Limits

2024 IRS contribution limits for 401(k), IRA, and HSA accounts, including catch-up amounts for saver…

UNITED KINGDOM

UK Income Tax & National Insurance Rates

UK Income Tax bands and National Insurance rates and thresholds for the 2024/25 tax year, including …

Formulas

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FORMULA

CAGR Formula

FORMULA

Compound Interest Formula

EMI Formula

FD Maturity Formula

GST Formula

PPF Formula

RD Maturity Formula

Simple Interest Formula

Worked Examples

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₹5 Lakh Fixed Deposit for 1 Year — Maturity Amount

Real computed maturity value for a ₹5 lakh fixed deposit over 1 year at 7% interest, quart…

₹5 Lakh Personal Loan for 3 Years — Monthly EMI

Real computed EMI for a ₹5 lakh personal loan over 3 years at 14% interest — see the exact…

₹50 Lakh Home Loan for 20 Years — Monthly EMI

Real computed EMI for a ₹50 lakh home loan over 20 years at 8.5% interest — monthly paymen…

₹8 Lakh Car Loan for 5 Years — Monthly EMI

Real computed EMI for an ₹8 lakh car loan over 5 years at 10% interest — see the exact mon…

GST on a Restaurant Bill — Worked Example

See exactly how 5% GST applies to a restaurant bill in India, split into CGST and SGST, wi…

Maxing Out a $23,000 401(k) Contribution — Projected Balance

See what maxing out the 2024 401(k) employee limit of $23,000 a year grows into by retirem…

PPF at ₹1.5 Lakh Per Year — Full 15-Year Maturity

See exactly what maxing out PPF at ₹1,50,000 per year grows into over 15 years at 7.1% — r…