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Air-Fuel Ratio — result sheet
Calculate the mass ratio of air to fuel and its reciprocal fuel-to-air ratio for a stated mixture.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Air-fuel ratio = air mass / fuel mass; fuel-air ratio = fuel mass / air mass.
Air-fuel ratio describes mixture composition by mass. This calculator reports the entered mixture ratio only; it does not identify stoichiometric oxygen demand, engine calibration, emissions, ignition quality, or safe operating conditions.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Air mass — mass units; minimum 1.0E-6; maximum 1000000000
- Fuel mass — same mass units; minimum 1.0E-6; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Air mass | 14.7 |
| Fuel mass | 1 |
Air-fuel ratio 14.7:1; fuel-air ratio 0.0680272.
Assumptions and limits
- Air and fuel masses use the same mass unit.
- The inputs describe one homogeneous mixture sample.
- No fuel chemistry, oxygen enrichment, humidity, engine state, or emissions model is inferred.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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