Unit Cost Calculator
Enter your pence per kWh rate and usage to see exactly what your gas or electricity is costing you.
Understand Your Utility Bills
Free calculators and plain-English guides to help UK households know exactly what they're paying for energy and water — and why. No sign-up, no data sent anywhere, just your numbers.
Energy Usage Estimator
Select your appliances and see your estimated monthly energy cost broken down by device. Instantly understand where your money is going.
Energy Tools →
Practical calculators for gas and electricity — unit costs, standing charges, direct debits and more.
Standing Charge Calculator
Find out how much your daily standing charges cost over a month, quarter, or full year.
Direct Debit Checker
Enter your current direct debit and actual usage to see if you're overpaying or building up credit.
Economy 7 Calculator
Calculate your costs across day and night rates and see if you're making the most of off-peak electricity.
See all energy tools →
Energy Guides →
Plain-English explanations of how your energy bill works and what you're actually paying for.
How to Read Your Energy Bill
A section-by-section walkthrough of a typical UK energy bill — what everything means and where to look.
What Is the Ofgem Price Cap?
Understand what the price cap is, how it affects your unit rate and standing charge, and what it means for your bill.
What Is Economy 7?
Find out how Economy 7 day and night rates work, who it suits, and whether it could save you money.
See all energy guides →
Water Tools →
Calculators to estimate your water bill, check your meter, and see how your usage compares to the UK average.
Average Water Usage Calculator
Enter your household size and property type to see your estimated water usage and how it compares to the UK average.
Water Meter vs Unmetered Calculator
Compare what you pay now against what a water meter would cost. Find out if switching could save you money.
Water Bill Estimator
Estimate your annual water bill based on your region and household size. See how you compare to UK averages.
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Water Guides →
Understand your water bill, whether a meter makes sense for you, and how to cut what you spend.
Average Water Usage in the UK
How much water does the average UK household use? See typical figures by household size and find out how you compare.
Water Meter vs Unmetered — Which Is Cheaper?
How metered and unmetered billing works, who benefits from a meter, and how to work out which suits your household.
How to Apply for a Water Meter
Most UK households can get a free water meter. Find out how to apply, what to expect, and whether you can switch back.
See all water guides →
Average Water Usage Calculator
How does your household water use compare to the UK average? Enter your household size and property type to find out in seconds.
Why use utilitieskit?
No login or sign-up required
Runs entirely in your browser
Your data never leaves your device
Independent — no suppliers, no sales
FAQs
Are the tools free?
Yes, everything on utilitieskit is completely free. No account, no login, no payment — open any tool and start straight away.
Is my data saved or shared?
No. Every calculation runs locally in your browser. Nothing is sent to any server — your figures stay entirely on your device.
Do you cover gas, electricity and water?
Yes. utilitieskit covers energy tools and guides for gas and electricity, plus a full set of water bill calculators and guides for UK households.