How long does it take to mow a lawn?

A typical 100 m² lawn takes around 20-30 minutes with a push mower. Larger lawns of 500 m² take about 60-90 minutes. Self-propelled mowers are about 20% faster, and ride-on mowers can cut large lawns 3-4 times faster than walking.

What mower width should I choose?

For small lawns (under 100 m²), a 30-35 cm cut width is fine. Medium lawns (100-300 m²) suit 35-45 cm. Large lawns (300+ m²) benefit from 45-55 cm. Ride-on mowers typically have 76-107 cm cutting decks.

How much overlap should I leave between passes?

A 10% overlap is standard and prevents missed strips. On uneven ground or with irregular edges, increase to 15-20%. Professional groundskeepers often use 10-15% overlap for a clean finish.

Do obstacles really add that much time?

Yes, each obstacle (tree, flower bed, ornament) adds 1-2 minutes for manoeuvring around it. A lawn with 10 obstacles could add 15-20 minutes to your total mowing time compared to an open lawn.

How often should I mow my lawn?

Weekly mowing is ideal from March to October in the UK. In peak summer, twice weekly may be needed. In spring and autumn, fortnightly is usually sufficient. Never cut more than one-third of the grass blade height at once.

GardenCalcs

Lawn Mowing Time Calculator — How Long to Mow Your Lawn

Estimate mowing time based on lawn size, shape, mowing method, and obstacles.

Lawn Area

Lawn area

Lawn ShapeLawn shape

Mowing MethodMowing method

Obstacles

Trees, beds, ornaments etc.

How We Calculate This

The calculator estimates mowing time using:

Effective cut width: Mower width minus overlap
Walking/driving speed: Push ~4 km/h, self-propelled ~4.8 km/h, ride-on ~8 km/h
Shape factor: Rectangles are fastest; irregular shapes add 20-35% time
Obstacle time: ~1.5 minutes per obstacle for manoeuvring

Frequently Asked Questions

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Last updated: March 2026

All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.