Browse 22 free calculators in the Home & Garden category.
Fence Calculator - You measured the perimeter but the quote lists panels, posts and labour separately. Enter fence length, height and type - get the exact number of panels and posts, plus a full cost breakdown with materials and installation.
Lawn Seed Calculator - Pick your lawn type, measure the area, get the exact seed weight. Five lawn types from utility (25-30 g/m2) to ornamental (45 g/m2), package count in 1 kg and 5 kg bags, and optional cost estimate at your local price per kilogram.
Fertilizer Calculator - Same garden bed, two soil conditions - the difference is 30% more fertilizer. Enter the area, pick your plant type (lawn, vegetables, flowers, trees or universal) and soil fertility level. Get the dose per m2, total weight in kilograms, bag count and cost.
Soil Calculator - You bought 10 bags of topsoil and ran out halfway through the bed. Enter the area, pick the layer depth and soil type. Get the exact volume in liters, bag count and cost - no guesswork, no second trip to the garden center.
Mulch Calculator - How many bags of bark mulch does a 20 m2 flower bed actually need? Enter the area, pick layer depth (5-10 cm) and mulch type. Get the exact bag count, volume in liters and cost estimate.
Compost Calculator - Three bin sizes, four composter types, one formula. Enter your household size and garden area - get the recommended composter capacity, annual waste estimate, compost yield and brown-to-green ratio.
Water Usage Calculator - Same household, two water bills - low-flow fixtures cut 40%. Enter your household size, shower frequency, laundry loads and garden watering to see daily, monthly and yearly water consumption with cost estimates.
Rainwater Harvesting Calculator - One roof, one formula, twelve months of free water. Enter your roof area, local rainfall and garden size to see how much rainwater you can collect, what tank size you need and how much you save on water bills.
Garden Irrigation Calculator - Four irrigation systems, three plant types, one watering schedule. Pick your garden area, plants and method to get weekly water volume, seasonal cost and system installation estimates side by side.
Lawn Mowing Calculator - How long does mowing a 300 m2 lawn actually take - and what does it cost per season? Enter your lawn area, mower type and frequency to see time, fuel or electricity consumption, and total cost from April to October.
Garden Pond Calculator - Every cubic meter of pond water weighs one metric ton - and a 4 m round pond holds 6.3 of them. Enter shape, dimensions and depth to get volume, EPDM liner size, plant count and fish capacity.
Electricity Usage Calculator - Your electricity bill doubled but you have no idea which appliance is responsible. Enter wattage, daily hours and your rate to see exactly how many kWh and dollars each device costs you per day, month and year.
Electricity Bill Calculator - Four numbers produce your full monthly electricity bill. Enter kWh consumed, energy rate, distribution charge and fixed fees to see the total with a line-by-line cost breakdown and effective price per kWh.
LED vs Bulb Calculator - Same room, two electricity bills. Compare the annual cost of traditional incandescent or halogen bulbs against LED replacements - electricity, replacement frequency and total savings over 5 years.
LED Payback Calculator - Every LED bulb starts in the red. Enter bulb prices, wattages and your electricity rate to see the exact month your investment breaks even, the annual ROI and how much pure profit you earn after payback.
Gas Bill Calculator - Your gas bill arrived but you have no idea how much is fuel, how much is distribution and how much is fixed fees. Enter your consumption and rates - get a clear monthly breakdown with fuel cost, distribution charge, fixed fees and an annual projection.
Gas vs Electric Heating Calculator - Three heating systems, one annual bill. Enter your home size, insulation level, gas price and electricity rate to compare gas furnace, electric heater and heat pump costs side by side. The calculator shows annual and monthly expenses for each option so you can pick the cheapest way to heat your home.
Solar Production Calculator - Same panels on a Phoenix roof produce twice as much electricity as on a London roof. Enter your system size (kWp), location, panel tilt, azimuth and type to estimate annual and monthly solar energy production in kWh.
Solar Payback Calculator - Same panels, two different payback periods - one owner self-consumes 70%, the other sells everything back. Enter your installation cost, system size, electricity price, and self-consumption rate to find out exactly when your solar investment breaks even and starts earning.
Solar Surplus Calculator - How much of your solar energy are you actually giving away for free? Enter annual production, household consumption, self-consumption rate and billing policy to see your surplus, grid credit and real electricity bill with solar.
Heat Pump COP Calculator - Three pump types, five temperature ranges, one efficiency number. Enter heating output and power draw or source and supply temperatures to calculate COP, efficiency class, and cost per kWh of heat for air-source, ground-source, and water-source heat pumps.
Heat Pump Savings Calculator - Compare your current heating bill with a heat pump. Annual savings, payback period, 10 and 15-year projections - with rebate and CO2 reduction included.