UK Everyday Calculators: Free Lifestyle and Utility Tools
Practical calculators for everyday life in the UK, from redundancy pay to solar ROI.
8
Free tools
2026/27
Tax year
HMRC
Verified rates
Not every financial calculation is about tax or mortgages. This collection covers the practical tools UK residents need day-to-day: working out statutory redundancy pay if you're facing redundancy, checking your annual leave entitlement, calculating whether solar panels are worth the investment, estimating energy bills under current unit rates, or checking whether you might have a car finance mis-selling claim. We've also included a pension projection calculator and child maintenance estimator. All tools use the most current official figures - redundancy pay caps from April 2026, holiday entitlement rules under current legislation, and NHS BMI guidelines.
All Everyday Tools Calculators
8 toolsCar Finance Claim Calculator
Estimate your potential car finance mis-selling compensation under the FCA investigation.
BMI Calculator
Calculate your Body Mass Index using UK NHS guidelines. Includes BMI categories and healthy weight range.
Energy Cost Calculator
Calculate your monthly and annual energy bills based on usage and current unit rates and standing charges.
Solar Panel ROI Calculator
Calculate the payback period and return on investment for solar panel installation in the UK.
Holiday Entitlement Calculator
Calculate statutory holiday entitlement for full-time, part-time, and irregular hours workers.
Redundancy Pay Calculator
Calculate your statutory redundancy pay based on age, length of service, and weekly pay (capped at £751).
Pension Calculator
Project your pension pot at retirement based on contributions, investment growth, and time to retirement.
Child Maintenance Calculator
Estimate child maintenance payments using the CMS statutory formula based on the paying parent's income.
Related Guides
January 2026
Statutory Redundancy Pay 2026/27: How Much Are You Entitled To?
Statutory redundancy pay is calculated using your age, years of service, and weekly pay (capped at £751 for 2026/27). We explain your rights and how to calculate your entitlement.
Read guideMarch 2025
Statutory Redundancy Pay 2026/27: How Much Are You Entitled To?
All workers are entitled to 5.6 weeks of annual leave. Part-time workers get the same entitlement on a pro-rata basis. We explain the calculation and your rights.
Read guideJanuary 2026
Are Solar Panels Worth It in the UK? 2025 Guide
With energy prices elevated and the Smart Export Guarantee paying for excess generation, the payback period for UK solar panels has fallen. We run the numbers for a typical 4kW system.
Read guideJanuary 2026
UK Net Worth by Age 2025: Are You on Track?
The PLSA retirement living standards suggest £37,000/year for a moderate retirement. We calculate what pension pot that requires and how to get there.
Read guideNovember 2024
Child Maintenance Calculations: How the CMS Formula Works
The Child Maintenance Service uses a percentage of the paying parent's gross income as the base calculation. We walk through every step of the formula.
Read guideFrequently Asked Questions
Common questions about everyday tools.
Statutory redundancy pay is calculated using a formula based on your age and length of service: 0.5 week's pay per year worked under age 22; 1 week's pay per year worked aged 22 to 40; 1.5 weeks' pay per year worked aged 41 and over. Weekly pay is capped at £751 for 2026/27 and the maximum statutory payout is £22,530 (30 weeks × £751). You must have worked for your employer for at least 2 years to qualify.
In the UK, workers are entitled to a minimum of 5.6 weeks' annual leave per year (28 days for someone working 5 days per week). This includes 8 bank holidays, which employers may or may not require you to take as part of your allocation. Part-time workers receive the same entitlement on a pro-rata basis - someone working 3 days per week receives 3 × 5.6 = 16.8 days per year.
According to the NHS, a healthy BMI for most adults is between 18.5 and 24.9. Underweight is below 18.5; overweight is 25 to 29.9; obese is 30 and above. However, BMI is a screening tool, not a diagnostic one - it doesn't distinguish between muscle and fat mass, and different thresholds apply for people of South Asian, Chinese, and other ethnic backgrounds.
The typical UK home solar installation (4kW system) costs £7,000 to £9,000 and generates around 3,400 kWh per year. At current energy prices (around 24p/kWh), that's roughly £816/year in savings plus any Smart Export Guarantee (SEG) payments for exported electricity. The payback period is typically 7 to 10 years, with the panels lasting 25+ years.
The Child Maintenance Service (CMS) calculates payments based on the paying parent's gross weekly income: 12% for 1 child; 16% for 2 children; 19% for 3 or more children. These percentages are reduced if the paying parent has overnight stays with the children. Payments can be arranged directly between parents or collected through the CMS (which charges a fee).
All calculations use official HMRC rates for 2026/27, updated April 2026. Results are estimates for guidance only - not financial advice. Our methodology · Disclaimer
