Penalty calculator
Facing a drink or drug driving charge? Answer a few questions to see the likely starting point, sentencing range and disqualification a magistrates' court would work from, and where the science might change the outcome.
Step 1: Choose the offence
Your result appears here
Choose an offence on the left and answer the questions to see the likely sentence.
Important: This calculator is a free guide based on the Sentencing Council's magistrates' court guidelines for England & Wales. It shows the starting point a court works from before adjusting for the specific facts of your case. It is not a prediction, a quote, or legal advice, and courts retain discretion. Actual sentences depend on aggravating and mitigating factors, plea, and the evidence. A technical toxicology review can, in the right case, challenge the reading itself.
A number on this page is a starting point, not a verdict
The penalty bands are driven by the reading and the offence. If the reading is wrong, or was influenced by something other than the alcohol or drug you consumed, the whole picture can change.
Back-calculations
Your level at the time of driving can differ from the station reading. A calculation may place you in a lower band, or below the limit entirely.
Laced drinks & medications
Spiked drinks, certain medicines, mouth alcohol and conditions such as acid reflux can all bear on a reading and on mitigation.
Procedure & the data pack
Device reliability and the analytical data behind the result are open to independent scrutiny, and errors do occur.
Not sure what your result really means?
Send us the reading and a short account of what happened. We'll tell you, free of charge, whether a toxicology review could realistically help your case, before you spend anything.