DIY・住宅改善 計算機

Rolls of wallpaper needed for a room. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Square metres of flooring with waste factor. Instant material estimate with formula, waste factor and step-by-step calculation guide.

Area and cost of carpet for any room layout. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Fence posts panels and materials calculator. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Decking boards and materials for any deck size. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Floor area volume and heating needs of a room. Enter your dimensions — see all measurements with formula and worked example. Free.

BTU cooling and heating capacity for any room. Instant material estimate with formula, waste factor and step-by-step calculation guide.

Interest saved and years off by overpaying mortgage. Instant result with amortization table, formula and chart. Free financial calculator.

Return on investment for home solar panels. Instant result with amortization table, formula and chart. Free financial calculator.

Annual boiler and home heating costs. Formula, worked example and unit conversions included. Instant thermodynamics solver.

Heat loss through different window types. Formula, worked example and unit conversions included. Instant thermodynamics solver.

Litres of paint needed for any room dimensions. Instant material estimate with formula, waste factor and step-by-step calculation guide.

Calculate years to break even on a solar investment. Enter system cost and annual savings — see payback year and lifetime return. Free.

Cost to fully charge an electric vehicle at home. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Annual heating oil usage and running cost estimator. Formula, worked example and unit conversions included. Instant thermodynamics solver.

Monthly broadband data usage from your habits. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Number and size of boxes needed for a house move. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Calculate your annual laundry costs. Enter wash frequency, machine type, and utility rates — see cost per wash and annual total. Free.

Compare water and energy cost of dishwasher versus hand washing per cycle. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Compare streaming service costs and content value. Enter your subscriptions — see monthly total, cost per show, and best value pick. Free.

Calculate cost per wear for any clothing item. Enter purchase price and estimated wears — see cost per use and compare to alternatives. Free.

Calculate savings from meal prepping vs eating out. Enter prep cost and dining-out spend — see weekly savings and annual total. Free.

Compare 5-year total cost of gym membership versus home gym equipment. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Estimate the full lifetime cost of owning a dog or cat including vet bills. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

Calculate your home office tax deduction. Enter office area, home size, and allowable costs — see simplified vs actual expense methods. Free.

Calculate savings from working from home. Enter commute cost, lunch, coffee, and clothing — see monthly and annual savings. Free.

Plan a monthly savings target to fund any holiday without using credit. Enter your value and unit — see the converted result with formula and equivalents. Free.

Audit all your subscriptions and calculate total monthly spend. Enter subscriptions — see total cost, unused ones to cancel, and annual savings. Free.

Set a clothing budget as a percentage of income and track cost per wear. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Compare the total cost of physical books versus ebooks including device cost. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Calculate the true cost of impulse spending. Enter items and frequency — see annual total, invested value, and opportunity cost. Free.

Calculate income potential from a side hustle. Enter hours, hourly rate, and expenses — see monthly income, annual projection, and tax estimate. Free.

Calculate the investment portfolio size needed to cover living expenses passively. Instant result with amortization table, formula and chart. Free financial calculator.

Compare DIY project cost versus contractor quote including your time value. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Plan annual gift spending across all recipients and occasions with monthly savings. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Estimate cash from selling unused household items on eBay, Vinted, and Facebook. Instant result with amortization table, formula and chart. Free financial calculator.

Build a monthly budget for living and working remotely in any destination. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Calculate the storage unit size you need. Enter furniture and box count — see recommended unit size in cubic feet. Free.

Calculate the full annual cost of any hobby. Enter equipment, consumables, and memberships — see total yearly spend and cost per session. Free.

Calculate total moving expenses including packing, transport, and setup. Enter your move details — see itemised costs and budget tracker. Free.

Calculate Home Energy Audit quickly and accurately. Enter your values — see the result with the formula, worked example, and unit options. Free.

True 5-year cost of owning a vehicle. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Find out what your car is worth as a trade-in vs private sale. Enter make, model, mileage and condition — get an instant estimate with detailed breakdown. Free.

Return on investment for vehicle modifications. Instant result with amortization table, formula and chart. Free financial calculator.

Total cost of ownership for business vehicle fleets. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Annual tire cost based on mileage and tire life. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Compare insurance policies by premium and deductible. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Monthly savings from refinancing your car loan. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Investment return on classic and collector vehicles. Instant result with amortization table, formula and chart. Free financial calculator.

Total cost comparison of electric vs gasoline vehicles. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Compare car subscription services against ownership. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Fuel cost and break-even analysis for diesel vs petrol. Based on veterinary guidelines. Instant result with breed notes and feeding chart.

When car sharing beats owning a vehicle. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Total cost of motorcycle ownership vs car. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Advertising ROI for vehicle wraps. Instant result with amortization table, formula and chart. Free financial calculator.

Maximum safe payload capacity for pickup trucks. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Financial analysis of living in a converted van. Fast and accurate result with formula, step-by-step method and unit overview. Free tool.

Annual cost of city congestion charges vs transit. Enter your figures — see the result with formula and year-by-year breakdown. Free.

Tax deduction value of donating your vehicle. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Trade-in value vs private party sale comparison. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Analyse profit and risk of buying a salvage title vehicle. Enter purchase price and repair cost — see net value and resale risk. Free.

Savings from switching transport modes in congestion zones. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Is comprehensive coverage worth it for your car?. Enter your values — see the result with formula, examples, and step-by-step working. Free.

Dealer vs wholesale parts pricing and DIY savings. Instant result with amortization table, formula and chart. Free financial calculator.