Australia GST Calculator (Add or Remove 10% GST & BAS)
Add 10% GST or calculate the 1/11th GST component backwards from inclusive totals.
How long does it take to read this?
Paste this into any page — the live tool appears with a credit link back here.
Estimate reading time (and speaking time) from a block of text.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.

Background reading: Reading Time on Wikipedia. More: all calculators.
Open the Blog Reading Time Estimator and use the controls in the workspace below: how long does it take to read this?. Results appear instantly in your browser, with nothing to install, sign up for, or pay for.
Yes. The Blog Reading Time Estimator is completely free, like every tool in the PrimeFreeTools library. There are no accounts, subscriptions, or usage limits.
No. The Blog Reading Time Estimator runs with JavaScript in your browser, so what you enter never leaves your device and nothing is stored on a server.
Estimate reading time (and speaking time) from a block of text. You will find it grouped under Calculators together with 116 other free tools on the PrimeFreeTools homepage.
Explore complementary free web utilities running 100% in your browser:
Add 10% GST or calculate the 1/11th GST component backwards from inclusive totals.
Calculate UK income tax, National Insurance, and take-home pay for 2024/25 & 2025/26.
Calculate time-and-a-half (1.5x), double time (2.0x), and California daily overtime.
Calculate how many pizzas to order for any party, meeting, or group event.
Sep 4, 2026
How long does it take to read this?
Read post