Daily Life
A 10-minute hot shower
10 minuutin kuuma suihku
30.7
Truecost score
Data confidence:
HIGH
Carbon and water from direct measurement. Among the most reliable estimates in the dataset.
A 10-minute shower uses ~90 liters and requires ~2.6 kWh thermal energy, producing ~0.8 kg CO₂e with EU average heating mix.
Did you know? Shortening your shower by 2 minutes saves more annual water than switching to a low-flow dishwasher.
Transparent calculation
How was this number determined?
The Truecost score is calculated from absolute physical values. Each row below shows the measured value, how it was normalized, and where it comes from.
| Dimension | Absolute value | Annual budget | % of budget | Weight | Weighted % | Confidence |
|---|---|---|---|---|---|---|
| Carbon Emissions | 0.8 kg CO₂e | 950 kg CO₂e | 0.08% | ×0.35 | 0.03% | HIGH |
| Water Consumption | 90.0 liters | 384,000 liters | 0.02% | ×0.2 | <0.01% | HIGH |
| Land Use | 0.0 m²·year | 5,100 m²·year | 0.00% | ×0.2 | 0.00% | HIGH |
| Waste | 0.0 kg | 500 kg | 0.00% | ×0.15 | 0.00% | HIGH |
| Toxicity | 0.1 µDALY | 16,200 µDALY | <0.01% | ×0.1 | <0.01% | MEDIUM |
| Weighted share of annual budget → Truecost score | 0.03% → 30.7 | |||||
Share of your annual planetary budget
Carbon Emissions
0.08%
Water Consumption
0.02%
Toxicity
<0.01%
Source data by dimension
Where do the absolute values come from?
Carbon Emissions
HIGH
90L × 25°C rise → Q = 90 × 4.186 × 25 = 9,419 kJ = 2.6 kWh thermal. Boiler eff ~85% → 3.1 kWh. EU mix: gas 60% (0.62kg), electric 25% (0.78kg), district 15% (0.31kg). Weighted ≈ 0.8 kg.
- Eurostat (2023): Household energy consumption by end-use
- IEA (2022): Residential energy use for water heating
Finnish district heating: ~0.3 kg. Gas boiler: ~0.6 kg. Coal electric: ~1.5 kg.
Water Consumption
HIGH
Standard shower head: 9 L/min (EU EN 16708). 9 × 10 = 90 L.
- Finnish Environment Institute SYKE: household water consumption
- EU Water Label: shower flow rate standards
Direct measurement, well-established.
Land Use
HIGH
Water treatment infrastructure land: negligible per shower.
Waste
HIGH
Negligible. Microbeads mostly banned in EU since 2023.
Toxicity
MEDIUM
Trace chemicals from shampoo/soap. Largely treated by municipal wastewater plants.
Comparisons
- 90 liters = one person's drinking water for 45 days
- Carbon: equivalent to generating ~160 AI images
Methodology
Water: 9 L/min × 10 min. Energy: Q = mcΔT for 90L × 25°C. CO₂: EU weighted avg across gas (60%), electric (25%), district heating (15%).
Sources
- Finnish Environment Institute (SYKE): household water consumption
- Eurostat (2023): Household energy by end-use
- IEA (2022): Residential water heating