CalcKitFree Online Calculators
65 fast, private calculators and career tools and business tools for health, money, productivity and everyday maths — no sign-up, works on any device.
⭐ Top Calculators
Our most searched calculators — start here, including the Gulf money hub.
Website Worth Calculator
How much is my website worth? Get an instant value estimate.
Gratuity Calculator
End-of-service benefit for UAE, Qatar, Saudi & more — 6 Gulf countries.
UAE Salary Calculator
Basic + allowances into monthly and annual pay, plus gratuity accrual.
Zakat Calculator
Calculate your 2.5% zakat due on gold, silver, cash and business assets.
Tip Calculator
Split the bill and calculate the perfect tip in seconds.
EMI / Loan Calculator
Calculate monthly loan EMI, total interest and total payable amount.
Overtime Calculator Qatar
Qatar overtime pay with the 25% legal premium.
Overtime Calculator Saudi
Saudi overtime pay at 1.5x hourly rate under Saudi Labor Law.
In-Hand Salary Calculator
India FY 2026-27: CTC to monthly take-home, new vs old tax regime.
Gold Rate Calculator
Value gold in any karat — grams or tola. Gulf & South Asia friendly.
🌍 Gulf Calculators Hub
All Gulf money calculators in one place: gratuity, overtime, salary, zakat & gold.
Embed this calculator free: put a working CalcKit calculator on your own site — see the free embed codes for Tip, BMI, EMI and Website Worth →
🚀 Free Business Growth Tools
Audit your website, check what it's worth, and get more customers — free.
Free Website Audit
Speed test + SEO checker for any website, powered by Google.
Website Worth Calculator
How much is your website worth? Get an instant value estimate.
Business Calculators
Profit margin, break-even point and ad ROI in seconds.
WhatsApp Link Generator
Free click-to-chat link: customers tap, chat opens.
🆕 New Calculators
Fresh tools — viral fun and Gulf money essentials.
Period Calculator
Free period calculator: enter your last period date and cycle length to predict your next period, ovulation day and fertile window.
In-Hand Salary Calculator
Free in-hand salary calculator for India FY 2026-27: enter CTC to see monthly take-home under new vs old tax regime, with PF and tax breakup.
TikTok Money Calculator
Free TikTok money calculator: enter monthly views to estimate creator earnings from TikTok's Creator Rewards program.
Overtime Calculator Saudi
Free Saudi overtime calculator: enter basic salary and overtime hours to see your overtime pay at 1.5x hourly rate under Saudi Labor Law.
Wedding Budget Calculator
Free wedding budget calculator: enter your total budget to get a smart category-wise breakup — venue, catering, decor, photo and more.
Crypto Profit Calculator
Free crypto profit calculator: enter buy price, sell price and investment to see profit, loss and ROI percentage instantly.
Loan Prepayment Calculator
Free loan prepayment calculator: see how much interest you save and how many months you cut by prepaying your loan early.
Love Calculator
Free love calculator: enter two names for an instant love compatibility score with a fun verdict. Share your result on WhatsApp!
YouTube Money Calculator
Free YouTube money calculator: enter monthly views and niche to estimate ad earnings. Includes TikTok creator estimates too.
End of Service Calculator Saudi
Free Saudi end of service calculator: enter salary and years of service for your EOSB award under Saudi Labor Law Article 84.
Age Difference Calculator
Free age difference calculator: enter two birth dates to see the exact age gap in years, months and days. Who's older?
Gold Rate Calculator
Free gold rate calculator: enter today's 24K price per gram to value gold in any karat — grams or tola. Gulf & South Asia friendly.
UAE Salary Calculator
Free UAE salary calculator: break down basic + allowances into monthly and annual pay, plus yearly gratuity accrual. No income tax in UAE.
Name Numerology Calculator
Free name numerology calculator: enter your full name to reveal your name number, lucky number and personality traits. Just for fun!
💼 Free Career Tools
Beat the ATS robots and land more interviews — free.
🔥 Most Popular
The calculators people search for most
🏦 EMI / Loan Calculator
2📊 SIP Calculator
3💰 In-Hand Salary Calculator
4⚖️ BMI Calculator
5🎂 Age Calculator
6％ Percentage Calculator
7🩸 Period Calculator
8💼 Salary / Tax Calculator
9📈 Compound Interest Calculator
10❤️ Love Calculator
11🔥 Calorie Calculator
12🏠 Mortgage Calculator
13🪙 Gold Rate Calculator
14🎵 TikTok Money Calculator
15🎬 YouTube Money Calculator
16🤰 Pregnancy Due Date Calculator
17🥚 Ovulation Calculator
18🧾 HRA Calculator
19💱 Currency Converter
20👔 Gratuity Calculator
21🏦 Loan Prepayment Calculator
22🪙 Crypto Profit Calculator
23💒 Wedding Budget Calculator
24⏰ Overtime Calculator Saudi
25🇸🇦 End of Service Calculator Saudi
26🇦🇪 UAE Salary Calculator
27💵 Tip Calculator
28📅 Date Difference Calculator
29🔬 Scientific Calculator
30🧬 Body Fat Calculator
31⚡ BMR Calculator
32💧 Water Intake Calculator
33😴 Sleep Calculator
34💳 Debt Payoff Calculator
35🏖️ Retirement Calculator
36🏘️ Rent vs Buy Calculator
37🔁 Refinance Calculator
Health Calculators
8 free tools
BMI Calculator
Calculate your Body Mass Index instantly and see if your weight is healthy.
Calorie Calculator
Find your daily calorie needs for weight loss, maintenance or gain.
Pregnancy Due Date Calculator
Estimate your due date, current week and trimester from your LMP.
Ovulation Calculator
Find your ovulation day, fertile window and next period date.
Body Fat Calculator
Estimate your body fat percentage with the US Navy method.
BMR Calculator
Find your Basal Metabolic Rate and daily calorie burn (TDEE).
Water Intake Calculator
How much water should you drink daily? Find out in seconds.
Sleep Calculator
Find the best bedtime or wake-up time based on sleep cycles.
Finance Calculators
21 free tools
EMI / Loan Calculator
Calculate monthly loan EMI, total interest and total payable amount.
Mortgage Calculator
Estimate monthly mortgage payments, total interest and loan cost.
Compound Interest Calculator
See how your savings grow with compound interest over time.
Car Loan Calculator
Work out your monthly car loan EMI, total interest and full cost.
Discount Calculator
Find the sale price, amount saved and final price after discounts.
RD Calculator
Find your recurring deposit maturity value and interest earned.
GST Calculator
Add or remove GST with the CGST + SGST or IGST split.
HRA Calculator
Compute your HRA exemption and how much of your HRA is taxable.
Overtime Calculator Qatar
Qatar overtime pay with the 25% legal premium.
EPF Calculator
Project your EPF balance with 12% employee and employer contributions.
FD Calculator
Compute fixed deposit maturity value, interest and effective yield.
Zakat Calculator
Calculate your 2.5% zakat due on gold, silver, cash and business assets.
Gratuity Calculator
End-of-service benefit estimate for UAE, Qatar, Saudi & more.
SIP Calculator
Project monthly SIP investment growth in mutual funds.
PPF Calculator
Project PPF maturity value with yearly deposits.
Currency Converter
Convert between 20 world currencies with live exchange rates.
Salary / Tax Calculator
Estimate take-home pay after tax in USA, UK, Pakistan, India & Qatar.
Debt Payoff Calculator
See when you'll be debt-free and how much interest you'll pay.
Retirement Calculator
Project your retirement nest egg from monthly savings.
Rent vs Buy Calculator
Should you rent or buy? Compare the true costs side by side.
Refinance Calculator
See if refinancing saves you money and when you break even.
Everyday Calculators
7 free tools
Age Calculator
Find your exact age in years, months, days — plus total days alive.
Tip Calculator
Split the bill and calculate the perfect tip in seconds.
Percentage Calculator
Solve any percentage problem: X% of Y, percent change and more.
Unit Converter
Convert length, weight, temperature, volume, area and speed.
Date Difference Calculator
Count days between two dates or add days to any date.
PDF Tools
Merge PDFs into one file or split pages out — free, in your browser.
Image Tools
Compress, resize and convert images (JPG, PNG, WebP) — free.
Math Calculators
1 free tools
Productivity Calculators
6 free tools
Word Counter
Count words, characters, sentences and reading time instantly.
GPA Calculator
Calculate your GPA from courses, credits and grades.
Password Generator
Generate strong, random, secure passwords in one click.
QR Code Generator
Turn any text or URL into a scannable QR code instantly.
Time Zone Meeting Planner
Pick a time in your zone, see it instantly in 8 world zones.
Pomodoro Timer
A simple 25-minute focus timer with short and long breaks.
📚 Calculation Guides
Step-by-step explainers for the questions behind the numbers
📋 UAE Gratuity, Explained
How end-of-service gratuity is calculated: the 21/30-day formula, basic-salary rule and a worked example.
🕌 Zakat Nisab 2026
The 87.48g gold / 612.36g silver threshold at today’s prices, and how to check your wealth.
🏦 EMI Prepayment Math
How extra payments cut interest: tenure vs EMI, a worked example, and charges to watch.
📚 All Guides →
Browse every step-by-step calculation guide.
Why use CalcKit?
Private by design. Every calculation runs entirely in your browser with JavaScript — your numbers are never sent to a server, stored, or tracked. What you calculate stays on your device.
Fast on any device. No frameworks, no heavy libraries, no accounts. Pages load in a fraction of a second even on slow mobile connections, and every calculator is designed mobile-first.
Built for real questions. From "what's my BMI?" to "can I afford this mortgage?", each tool pairs an instant calculator with a plain-English guide and answers to common questions — so you understand the result, not just the number.