All-in-One Calculator Suite – Age, BMI, GST, Percentage | FixITtoolBox

Calculator Suite – Age, BMI, GST & More

How This Tool Suite Works

All calculators run in your browser—no data is sent to servers. Simply input your values (DOB, height, price, etc.), click Compute, and receive instant results.

Why Use This Calculator Suite?

No signup or installation required
Works fully offline in the browser
Mobile‑friendly and fast
Supports multiple calculators in one place
Clean design, accessible and ad‑free

FixITtoolBox’s Free Calculator Suite helps you perform essential day-to-day calculations without installing any app. Whether you’re checking your Body Mass Index (BMI), computing your exact age, estimating GST tax, or finding percentage values, our online tools are fast, accurate, and 100% free. No logins, no ads, just easy results. Try them below!

Age Calculator

Simple (Years) Detailed

Date of Birth

Target Date (Optional)

BMI Calculator

Metric Imperial

Weight (kg)

Height (cm)

GST Calculator

GST Inclusive GST Exclusive

Amount

GST Rate (%)

Custom GST Rate (%)

Percentage Calculator

X% of Y X is what % of Y Change from X to Y

Value X

Value Y

👉 Need help? Read our full guide on BMI

👉 Want to understand GST? Check our GST Calculator Guide

👉 Confused about percentage formulas? Read our guide on percentages

👉 Know how it works: How Age Calculator works