What changes the answer
Plans can include daily charges, controlled rates or time bands. Enter the lines that apply and compare the same period.
NZNZD · en-NZ
New Zealand home calculators
Turn a New Zealand home-energy plan into checkable appliance, heating and solar scenarios.
What people mix up
Home projects use metric units. International products or listings should be converted before a quantity is calculated.
Pain points covered
Decisions this pack helps you check
Estimate energy-label running cost.
Compare heating input with a visible COP or efficiency.
Explore solar self-consumption and battery shifting.
Plan metric materials from measured dimensions.
Available for New Zealand
14 relevant calculators
Currency symbols are presentation only; enter the current plan, label or project values that apply to you.
Working shownEnergy bills & appliancesGlobal Appliance Electricity Cost Calculator
Estimate appliance energy and cost in your own currency from label watts, runtime and your electricity rate
Open calculator Working shownEnergy bills & appliancesEffective Electricity Bill Rate CalculatorSeparate fixed charges from energy charges and calculate both all-in and usage-only bill rates
Open calculator Working shownEnergy bills & appliancesElectricity Bill Change ExplainerExplain why an electricity bill changed by separating billing days, daily usage, effective usage rate and fixed charges
Open calculator Working shownEnergy bills & appliancesTime-of-Use Electricity Plan ComparisonCompare peak and off-peak energy charges with a flat-rate plan using the same electricity use
Open calculator Working shownEnergy bills & appliancesHome EV Charging Cost CalculatorEstimate wall energy, charging cost and cost per distance with visible charging losses
Open calculator Working shownEnergy bills & appliancesHeat Pump vs Resistance Heating CalculatorCompare electricity needed for the same useful heat using an editable heat-pump COP
Open calculator Working shownEnergy bills & appliancesAppliance Label Annual Cost CalculatorTurn the annual kWh on an official appliance label into annual and multi-year energy cost
Open calculator Working shownSolar, battery & backupSolar Self-Consumption Value CalculatorSeparate solar electricity used at home from exports and value each with its own rate
Open calculator Working shownSolar, battery & backupHome Battery Energy-Shift CalculatorEstimate deliverable shifted energy and gross rate-spread value after round-trip losses
Open calculator Working shownSolar, battery & backupGlobal Battery Backup Runtime CalculatorEstimate backup runtime from voltage, amp-hours, usable discharge, conversion efficiency and load
Open calculator Working shownHome projectsConcrete Volume Calculator — Metric & US UnitsCalculate rectangular concrete volume in cubic metres or cubic yards with explicit unit conversion and waste
Open calculator Working shownHome projectsPaint Quantity Calculator — Litres & GallonsEstimate paint from wall dimensions, openings, coats and the exact product coverage
Open calculator Working shownHome projectsFlooring & Tile Quantity CalculatorEstimate floor area, pieces and packs using metric or imperial dimensions and a visible waste allowance
Open calculator Working shownProperty & area unitsInternational Property Area TranslatorConvert standard property-area units while keeping the exact factor and both unit labels visible
Open calculator Independent verification
Full source library 8 official New Zealand resources
These links help verify tariffs, labels, schemes, measurements and rules. Their inclusion is not an endorsement.
New Zealandconsumer
Home energy upgrades calculator
Energy Efficiency and Conservation Authority
Independent upgrade-planning resource.
Open official resourceNew Zealandappliances
Energy rating labels
Energy Efficiency and Conservation Authority
Official consumer explanation of product energy labels.
Open official resourceNew Zealandbills
Your power bill
Electricity Authority
Consumer guide to New Zealand bill components.
Open official resourceNew Zealandbills
Powerswitch
Consumer NZ
Independent electricity plan comparison supported by the Electricity Authority.
Open official resourceNew Zealandbuilding
Building Code
Ministry of Business, Innovation and Employment
Official compliance documents; a quantity estimate is not building consent.
Open official resourceNew Zealandmeasurement
Measurement standards
Measurement Standards Laboratory of New Zealand
National measurement standards reference.
Open official resourceNew Zealandsolar storage
Plan your home solar system
Energy Efficiency and Conservation Authority
Independent solar planning guidance.
Open official resourceNew Zealandappliances
Energy efficiency regulations
Energy Efficiency and Conservation Authority
Current regulated-product information.
Open official resource