Every calculator, planner and reference page published on The Useful Site, grouped by subject. There are 64 tools across eight subjects, each listed once.
There is one guide as well — long-form explanations rather than calculators. Browse the guides.
For a quicker route, use the search box at the top of any page, or open the full search page and describe the problem you are trying to solve.
Technology 12 tools
Storage, networking, Windows, backups and practical IT tools.
- CCTV Storage Planner
- Drive Fill Time Calculator
- Home Network Designer
- Internet Speed Requirement Checker
- Internet Upload Time Calculator
- IPv4 Subnet Calculator
- NAS Drive Planner
- Network Throughput Calculator
- Password Strength Checker
- Wi-Fi Design Tool
- Wi-Fi Signal Loss Calculator
- Windows Pagefile Size Calculator
Home & DIY 14 tools
Materials, measurements, decorating and household project planning.
- Can My Floor Take It?
- Cold Radiator Fault Finder
- Condensation Risk Calculator
- Curtain Drop Calculator
- Damp Diagnoser
- Extractor Fan Size Checker
- Loft Boarding Planner
- Moving Furniture Checker
- Paint Coverage Remaining Calculator
- Radiator Sizing Wizard
- Shed Base Calculator
- Stair Rise and Going Calculator
- Wall Drying Time Estimator
- Wallpaper Roll Calculator
Finance & Budgeting 10 tools
Savings, borrowing, household costs and everyday money decisions.
Gardening 4 tools
Soil, planting, water, compost and garden project calculations.
Food & Drink 9 tools
Oven settings, roasting times, conversions, scaling and quantities for a crowd.
Travel & Transport 3 tools
Journey times, fuel, luggage, parking and holiday planning.
Hobbies & Interests 3 tools
Scale models, 3D printing, photography, astronomy and collections.
Everyday Life 9 tools
Small calculations that make ordinary decisions easier.