F1 race time: How long does a Formula 1 Grand Prix last on average

F1 race times are set at a certain distance which usually work out around 90 minutes long. But what does the rulebook actually say?
How long are Formula 1 races, and why? Here's what the F1 rulebook says

How Does Formula 1 Qualifying Work?

Formula One - Quick Guide

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2021 F1 calendar: Formula 1 grand prix schedule details

Brazilian GP qualifying start time, Formula 1

What time is the F1 Sao Paulo Grand Prix and where can you watch the Brazilian GP?

101 Formula 1 Trivia Questions to Race Your F1 Knowledge!

How fast is an F1 car? Top speeds of F1, IndyCar, MotoGP and more

Formula 1 Drive to Survive': What to Know to Start Watching