Utilitas

Best for: Monthly household energy budgeting

Calculate the running cost of every appliance in your home. See which devices cost the most and how much you spend on electricity per day, month, and year.

Best for: Big one-off trade-off decisions

See how your dream wedding delays saving for a house deposit. Adjust costs by category, compare cultural presets, and see the opportunity cost of wedding spending.

Best for: Fast international scheduling

Convert times between cities and timezones. Find overlapping business hours for international meetings. DST-aware, with a visual 24-hour timeline.