How many fairy lights do I need?

For a warm, ambient glow, plan for about 100 lights (10 metres) per 3-4 square metres of wall or ceiling space. Curtain lights need more — roughly 5 vertical strings per metre of width.

Are LED fairy lights better?

Yes, LED fairy lights are cooler to touch (safer near fabrics), use less electricity, and last much longer. They are available in warm white, cool white, and multicolour. Warm white gives the most atmospheric feel.

Can I use fairy lights outdoors?

Only use lights rated for outdoor use (look for IP44 or higher rating). Battery-operated lights are safest outdoors where mains power is not available. Solar-powered fairy lights work well for summer evening events.

How do I hang fairy lights on a ceiling?

Use adhesive hooks rated for the weight, or drape them over existing beams and fixtures. For marquees, cable ties work well. Avoid using drawing pins or nails in rented venues — always check the venue rules first.

PartyCalcs

Fairy Light Calculator — Metres of Lights Needed

Calculate how many metres of fairy lights you need for your party venue or outdoor space.

Area / Length to Cover

Wall length, ceiling area, or object length

Light Style

Price per String (optional)

Include 10% extra

Extra for corners, draping, and spare bulbs

How We Calculate This

This calculator estimates fairy light requirements based on the area to cover and your chosen style.

The formula

Draped: Area in metres x 1.3 (allows for loops and draping).

Curtain / waterfall: Width x 5 strings per metre.

Ceiling canopy: Area x 3 for multiple passes across the ceiling.

Wrapped: Length x 4 for wrapping objects tightly.

Standard fairy light strings are 10m with 100 LEDs. A 10% spare allowance can be added.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Adjust quantities based on your guests and event type.