Tools & calculators

Work out dimensions, spacing and material quantities before you buy or build, with practical calculators in metric and imperial units

Bin Enclosure Width Calculator

Find the internal width for bins placed side by side

Calculate birdsmouth heel, notch depth and height above plate from roof pitch, actual rafter depth and your chosen seat length

Calculate how many full-width boards fit with your chosen gap

Plan multiple fence sections, corners and gate openings with estimates for posts, rails, wire mesh or vertical boards

Estimate firewood to buy for winter from stove output or measured use, with extra stock, existing wood and metric or imperial units

Calculate how much gravel to order and estimate material cost from your area, depth and optional supplier price

Calculate how much mulch you need in bags or bulk and estimate the cost using your garden area and layer depth

Calculate roof angle, pitch ratio and sloping length from your roof measurements, with feet and inches or metric units