🧾 Tariff Comparison Calculator for Energy
Compare two electricity plans using your daily peak and off-peak consumption.
This free tool helps you turn project measurements into a practical planning estimate. Enter values in Vaelden’s interactive calculator, review the result, and confirm important assumptions against supplier data, measurements, codes or qualified advice before committing materials or money.
Open the Tariff Comparison calculator →
How to calculate tariff comparison
Method: Daily plan cost = peak energy × peak rate + off-peak energy × off-peak rate + supply charge
- Split measured daily energy by tariff period.
- Apply each plan’s usage rates.
- Add daily supply charges and compare over a representative year.
Worked example
Using these planning inputs:
- Peak energy per day: 8 kWh
- Off-peak energy per day: 12 kWh
- Plan A peak rate: 0.38 currency/kWh
- Plan A off-peak rate: 0.2 currency/kWh
- Plan A daily supply: 1.05 currency/day
- Plan B peak rate: 0.31 currency/kWh
- Plan B off-peak rate: 0.25 currency/kWh
- Plan B daily supply: 1.15 currency/day
Lower estimated annual plan: Plan A
Reality check: Demand charges, controlled loads, discounts, solar exports, seasonal rates and contract terms may change the real comparison.
Before you calculate
Use consistent units and the best measured inputs available. Real materials, equipment, site conditions and tolerances can change the result. Vaelden shows planning estimates; regulated, structural, electrical, plumbing, pressure and other safety-critical work still requires appropriate local compliance and professional advice.