Why WattWorth exists
Make invisible everyday flows visible.
Electricity, water, food, packaging, breathing and household spending happen in small amounts. WattWorth turns those small amounts into a day, month and year — quickly enough to be useful.
A question should lead to an answer
Each calculator begins with a familiar question: why did a bill rise, how much does a dripping tap waste, or what does a device cost while idle? Ready-made examples give an immediate result; personal numbers make it more accurate.
One toolkit, not isolated widgets
Energy, water, body, food, waste and budgets affect the same household. The My Year page brings the main results together without asking the same questions again.
Private by default
No registration is required. Calculator inputs and the optional household profile stay in local browser storage. WattWorth records only anonymous aggregate counts needed to understand whether tools are being used.
Honest about uncertainty
These are planning estimates, not utility bills, medical advice or official price statistics. Important assumptions are shown, editable and documented on the methodology page.