Why AutoCifra asks for a price
Fuel prices change by location and date. A calculator is more useful when you enter the pump price relevant to you.
UK official context
HMRC publishes advisory fuel rates and explains its fuel-price assumptions in pence per litre and miles per gallon. These rates are for specific tax/reimbursement purposes, not a universal retail price.
Use a current local figure
For personal journey calculations, use the current price displayed by the petrol station or price source you trust, then enter it into AutoCifra.
Last reviewed: 31 August 2026. See also methodology and sources.