Trust

Methodology

This page explains the calculator rules, the limits of those rules, and why we show ranges instead of guarantees.

Best forChecking how the site is run and updated.
Main cautionCooking results are guidance, not guarantees.
Reviewed23 July 2026
Owner and editorSyed Saud Ahsan
Review statusCalculation rules, safety wording and source links are checked for consistency. Real-world test batches are labelled separately when available.
About the editor

Calculator methodology

The calculator starts from the user's original instruction, then applies a cautious conversion rule. The aim is to provide a useful starting point with an early check, not a guarantee.

  • Use the calculator as guidance.
  • Check food early.
  • Contact us with corrections or useful food examples.

Core conversion rule

Most oven conversions begin by lowering the temperature and reducing the time. The result is then adjusted for food category, frozen state, air fryer style, model profile and desired finish.

  • Conventional oven instructions usually start around 20C lower.
  • Fan oven instructions receive a smaller drop because they already use moving air.
  • Time is shortened into a range and the check-from time is earlier than the final range.

Limits of the method

A calculated method cannot know the exact thickness, basket load, filling temperature, drawer shape or user appliance condition.

  • Meat, fish and reheated food need centre checks.
  • Crowded baskets can cook unevenly and need shaking or extra time.
  • Very dense frozen food may need more time even if the surface looks browned.

Evidence level

Current results are calculated guidance. The food-testing log now defines the evidence required before any result can be labelled human-tested.

Sources and method