Sidewalk & Walkway Concrete Calculator

By Vinod Kondeti · Updated October 14, 2026

A walkway is a long, thin slab, so small changes in width add up over the length. Enter the total length of the path. For a path with turns, add the straight sections together.

Length (ft)Width (ft)Thickness (in)Quantity (pcs)Waste / extra (%)

Cost estimate (optional, enter your local prices)

Price per 80 lb bag ($)Ready-mix price per yd³ ($)Delivery / short-load fee ($)

Cubic yards	–
Cubic feet	–
Cubic meters	–
80 lb bags (0.60 ft³ each)	–
60 lb bags (0.45 ft³ each)	–
40 lb bags (0.30 ft³ each)	–
Cost in 80 lb bags	–
Cost as ready-mix	–

Working: –

How do I measure for a sidewalk pour?

Width is measured inside the forms.
Curved paths: measure along the centre line for the length.
Many DIY walkways are poured at around 4 in thick. Check your local requirements before you pour.

Sidewalk concrete questions

How much concrete for a 30 ft × 4 ft walk at 4 in?

30 × 4 × 0.333 = 40 ft³ = 1.48 yd³, about 67 bags of 80 lb mix before waste.

Should I order by the yard or buy bags?

For about 1.5 yd³ you are mixing roughly 70 bags of 80 lb, so compare that labour against a short-load ready-mix delivery.

Bag yields: 0.30 / 0.45 / 0.60 ft³ for 40 / 60 / 80 lb standard concrete mix (manufacturer data sheets). The concrete guide has the formulas and worked examples.

Sidewalk & Walkway Concrete Calculator

How do I measure for a sidewalk pour?

Sidewalk concrete questions

How much concrete for a 30 ft × 4 ft walk at 4 in?

Should I order by the yard or buy bags?

Sources

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