AVIF Savings Calculator

Estimate the weight saving from converting images to AVIF.

About AVIF Savings Calculator

AVIF compresses better than WebP, typically saving another 20 per cent, but encoding is far slower. That makes it best suited to build-time conversion rather than on-the-fly generation. Serving AVIF with WebP and JPEG fallbacks captures the maximum saving per browser at the cost of storing three variants.

Formula

AVIF Savings

AVIF weight = JPEG weight × (1 − saving); typical saving is 40 to 55 per cent

AVIF: Newer format offering better compression than WebP, at higher encoding cost

Worked example

With the default values below, AVIF Savings Calculator returns AVIF Weight of 700.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Current JPEG weightminimum 0 KB: 1,400 KB
AVIF saving against JPEGaccepts 0–100 %: 50 %
WebP saving for comparisonaccepts 0–100 %: 30 %
Monthly visitsminimum 0: 60,000

Results

AVIF Weight: 700.0 KB
WebP Weight for Comparison: 980.0 KB
Additional Saving Over WebP: 280.0 KB
Monthly Bandwidth Saved Against JPEG: 40.054 GB
Weight Reduction Against JPEG: 50.00%

Step by step

1Values used
2AVIF Savings
3AVIF Weight= 700.0 KB
4WebP Weight for Comparison= 980.0 KB
5Additional Saving Over WebP= 280.0 KB
6Monthly Bandwidth Saved Against JPEG= 40.054 GB
7Weight Reduction Against JPEG= 50.00

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is AVIF Savings calculated?

AVIF weight = JPEG weight × (1 − saving); typical saving is 40 to 55 per cent AVIF compresses better than WebP, typically saving another 20 per cent, but encoding is far slower. That makes it best suited to build-time conversion rather than on-the-fly generation.

Why does AVIF Savings matter?

Serving AVIF with WebP and JPEG fallbacks captures the maximum saving per browser at the cost of storing three variants.

What values do I need to enter?

This calculator takes 4 inputs: Current JPEG weight, AVIF saving against JPEG, WebP saving for comparison, Monthly visits. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.