What It CostsBill planners
One appliance is a calculation. A bill is a project — every appliance in one sheet, a meter reading habit, and the tariff comparison that decides the rest.
Appliance Replacement Payback
Old appliance, new appliance, the price gap and your own electricity price — worked into the year the replacement pays for itself.
EV Charging Log
Every charge in one table — energy added and the rate you paid — totalled across home and public charging, with cost per mile.
Household Appliance Audit
Every appliance in one table — watts, hours and days each — totalled into a yearly cost you can check against the actual bill.
Meter Reading Schedule
A reading date every month, set once, with an email reminder — so estimated bills stop being a thing that happens to you.
Standby Audit Sheet
Every device that is never really off, in one table with its standby draw — totalled into the yearly cost of doing nothing.
Tariff Comparison Sheet
Unit rate, standing charge and your own yearly usage per tariff, totalled — the comparison the headline rate cannot give you.
Free to use, Pro to keep
Every tool on this page works straight away, with no account and no limit on how often you use it. Put your numbers in and you get the answer, the same as on the rest of the site.
What Pro adds is memory and reach. It saves a setup to your account so it is there on your phone as well as the machine you built it on. It turns a result into a page you can send to somebody. It emails you when a date you set is coming, instead of leaving that to your own memory. And it takes the ads off — here and on every other site we run, on one subscription.
These tools exist because the ordinary calculators on this site answer a single question, and some questions are not single. A number you need again next month is not a calculation, it is a record.
See what is included on the Free and Pro page.