Convert
Unit Converter
Convert values across reviewed measurement categories with transparent methods, exactness labels and shareable results.
Open toolPractical calculators · transparent assumptions
Convert units and plan portable power with the math visible.
Start with a focused calculator, inspect the assumptions behind the result, and share a link that preserves the inputs.
- Browser-local calculations
- Editable assumptions
- Shareable result links
Start here
Choose the job you need to finish
Convert a value directly, or build one complete equipment plan for battery capacity, output, runtime and solar recharge.
Power & Energy
Power Station Runtime & Sizing Planner
Calculate required battery capacity, continuous and startup output, estimated runtime and solar recharge time from one equipment plan.
Open toolFocused calculators
Answer one power question at a time
5 tools available
Power & Energy
Portable Power Station Size Calculator
Calculate the nominal watt-hours, continuous output and startup output required from a portable power station for an appliance schedule.
Open toolPower & Energy
Power Station Runtime Calculator
Estimate how long a battery power station can run one device or a repeating equipment load after reserve and conversion losses.
Open toolPower & Energy
Solar Charge Time Calculator for Power Stations
Estimate solar charge time in equivalent sun hours and days from battery capacity, panel watts, input limits and charging losses.
Open toolWorked answers and field guides
Understand the result before relying on it
Each guide states its assumptions, shows the calculation and opens the matching tool with the example already loaded.
Worked answer
How long will a 1,000 Wh battery run a 100 W load?
Compare the 10-hour ideal, the 8 h 30 min shortcut and a 7 h 39 min plan that keeps a 10% reserve.
Measurement guide
Measure equipment power before sizing the battery
Turn a meter reading into a representative load without confusing average demand, peaks and startup power.
Solar compatibility
Check voltage, current and wiring before panel watts
Use five separate gates—including a worked cold-weather Voc calculation—before estimating charge time.
How Tollica handles trust
Separate the calculation from the claim
- Deterministic calculations use the same engines as the tools.
- Guides disclose reserves, losses and measurement limits.
- Product compatibility still requires the exact manufacturer ratings.