---
type: "page"
title: "Free Online Calculators"
description: "Use free online calculators for GST, EMI, salary, income tax, SIP, percentage, age, discounts, interest and everyday calculations. Get fast and accurate results."
resource: "https://www.gstcalculators.in/"
language: "en"
bundle_generated: "2026-10-12"
---

# Free Online Calculators

Use free online calculators for GST, EMI, salary, income tax, SIP, percentage, age, discounts, interest and everyday calculations. Get fast and accurate results.

- Canonical page: [Free Online Calculators](https://www.gstcalculators.in/)
- Publisher: [Tool Master Hub / GSTCalculators.in](../site.md)
- Category: [About, Policies and Directories](../categories/site.md)

This is a discovery summary of the public page, not an independently reviewed replacement. Use the canonical page for current inputs, assumptions, formulas, source links and results. The bundle generation date does not mean that tax rules were reviewed on that date.

## Topics on the page

- Basic Financial Calculators
- Investment Calculators
- Tax & Loan Calculators
- Business & Workplace Tools
- Specialized Industry Tools
- Everyday Utility Calculators
- From the Blog

## Questions and answers from the visible page

### What are the current GST slabs in India?

Since 22 September 2025 the main slabs are 0%, 5%, 18% and 40%, plus 3% for gold and 0.25% for rough diamonds. The 12% and 28% slabs were withdrawn under GST 2.0.

### Is the 12% GST slab still valid?

No. Charging 12% on an invoice dated on or after 22 September 2025 is incorrect and can attract a penalty under Section 122 of the CGST Act.

### Which cities get the 50% HRA exemption?

Four metros for FY 2025-26. From 1 April 2026 the Income-tax Rules 2026 add Bengaluru, Pune, Hyderabad and Ahmedabad, making eight.

### What replaced Section 80C?

Under the Income-tax Act 2025, in force 1 April 2026, Section 80C is renumbered Section 123. Limits are unchanged.

### Are these calculators free?

Yes. All 98 are free, need no sign-up, and run entirely in your browser — your figures are never uploaded.

### Which languages are supported?

Thirteen: English, Hindi, Bengali, Marathi, Telugu, Tamil, Gujarati, Urdu, Kannada, Malayalam, Odia, Punjabi and Assamese.

## Accuracy and corrections

[Methodology](https://www.gstcalculators.in/methodology.html) · [Editorial policy](https://www.gstcalculators.in/editorial-policy.html) · [Disclaimer](https://www.gstcalculators.in/disclaimer.html) · [Report a problem](https://www.gstcalculators.in/contact.html).