Free calculators from Home Exterior Lab to help you plan your exterior projects with confidence. Each tool works out quantities, sizes and costs for you, backed by our 2026 cost data, practical guides and answers to common questions.
Paint Coverage Calculator
How much paint to buy: gallons, can sizes and cost.
Mulch Calculator
Cubic yards and bag counts for up to 3 beds.
Gutter Size Calculator
5-inch vs 6-inch gutters plus downspout count.
Deck Board Calculator
How many deck boards, fasteners and total cost.
Siding Calculator
How many squares of siding, cartons and material cost.
Paver Base Calculator
Cubic yards, tons of base and sand bedding.