Most Popular Calculators
The fastest way to the tools people search for most.
Browse Free Calculators by Category
50+ free calculators across finance, health & fitness, math, date & time, education, construction and unit conversion — each with an Indian and global number format.
Financial Calculators
Home loan, personal loan and gold price tools that work in both Indian (₹) and global ($) number formats.
India-Only Calculators
Tools built specifically around Indian tax rules, EMI conventions, jewellery conventions and delivery platforms — not meant for use outside India.
Rajasthan Calculators
Calculators built around Rajasthan-specific tariffs and regulations — accurate only for consumers in Rajasthan.
Health & Fitness
Track BMI, calories, body fat and a healthy pregnancy timeline.
Math Calculators
Everyday and academic maths made simple — percentages, averages and more.
Date & Time Calculators
Age, date differences and working hours calculators.
Education Calculators
GPA, CGPA, SGPA, attendance, grade and marks calculators for India and global students.
Converters & Tools
Convert everyday units, switch recipe measurements between grams and cups, shrink images to WebP in bulk, and generate a custom or UPI payment QR code instantly.
Construction Calculators
Plan a build or renovation in India — concrete, bricks, square footage, tiles and paint, each with a material cost estimate.
Best Phones by Budget
Top 10 value-for-money mobile phones in India, ranked from ₹10,000 to ₹50,000.
Why allcaltools?
India & Global Ready
Switch between Indian numbering (₹, Lakh/Crore) and international numbering ($, Thousand/Million) with one tap in the navbar — the same calculators work whether you're in Mumbai or Manhattan.
Visual Results
Every calculator includes a clear chart alongside the numbers so results are easy to understand at a glance.
Free & Private
All calculations run in your browser. Nothing you type is uploaded or stored anywhere — there's no server round-trip, so your numbers never leave your device.
How to Use allcaltools
- Use the search bar, or browse calculators by category — Financial, Health & Fitness, Math, Date & Time, or Converters.
- Click the calculator you need to open its dedicated page.
- Fill in the required inputs, such as loan amount, height and weight, or dates.
- See your result immediately, calculated live in your browser as you type.