Environment · Utility calculator
Plastic Bottle Habit Audit
Calculates annual plastic bottles, spend, plastic weight, CO2, and reusable bottle payback.
Instant result
Plain-English why
Copyable takeaway
What this means
Annual bottles: 520. Annual cost: £624.00. Plastic: 10.4 kg. CO2: 43.16 kg. Reusable payback: 14.6 days.
Formula used
Annual bottles bottles_week*52. Annual cost annual_bottles*price. Plastic kg annual_bottles*20/1000. CO2 kg annual_bottles*0.083. Payback days (reusable_cost / annual_cost) * 365.
Worked example
10 bottles/week at £1.20. Annual 520 bottles, £624, 10.4kg plastic, 43.16kg CO2. £25 reusable payback 14.6 days.
Common questions
Can I use this internationally?
Yes. Currency selectors are display-only unless a tool explicitly says otherwise; no currency conversion is performed.
How exact is the result?
It follows the published Technofatty formula for this tool, but real life can add fees, rules, timing quirks, and context.
Plain-English summary
My bottle habit is 520/year, 10.4kg plastic, costing £624.
This section translates the result into a short, direct takeaway rather than leaving the page at a bare number.
Related instruments
Keep going
Flight Carbon Cost in Plain Numbers
Estimate passenger flight CO2e from distance, return trip, passengers, radiative forcing, and cabin class.
Open verdictHome Heating Carbon Footprint Estimator
Estimate annual heating CO2e from fuel type and bill or kWh, then translate it into car, flight, and tree equivalents.
Open verdictIs My Recycling Actually Being Recycled?
Score common recycling-bin items against standard kerbside rules and flag contaminants.
Open verdict