---
title: "Calculators | Home Comfort Lab"
description: "Work out what size dehumidifier you need, what an appliance costs to run, and whether your rooms are at risk of mould."
url: https://homecomfortlab.co.uk/tools/
---

# Calculators

Work out what size dehumidifier you need, what an appliance costs to run, and whether your rooms are at risk of mould.

![A hallway table with a hygrometer, a notepad of bar charts and an energy monitor plugged into a small heater.](https://homecomfortlab.co.uk/images/scenes/tools.svg)

## Calculators

- [What size dehumidifier do I need?](https://homecomfortlab.co.uk/tools/dehumidifier-size-calculator/)
  Answer four questions about your home and get the dehumidifier size and type that suits it, with what it will cost to run.
- [Appliance running cost calculator](https://homecomfortlab.co.uk/tools/running-cost-calculator/)
  Find out what any electric appliance costs per hour, day, month and winter at the current UK price cap.
- [Humidity and mould risk checker](https://homecomfortlab.co.uk/tools/humidity-mould-risk-checker/)
  Enter your room temperature and humidity to see your mould risk and the temperature at which walls and windows start to get wet.
- [Heating cost per hour: throw, heaters, gas, oil and heat pump compared](https://homecomfortlab.co.uk/tools/heating-cost-per-hour/)
  Compare the hourly cost of a heated throw, electric blanket, plug-in heaters, and gas, oil, heat pump and electric central heating.

## Home Comfort Cost Index

Updated every quarter when the price cap changes.

- [Home Comfort Cost Index, Q4 2026: what it costs to heat, dry and cool a home](https://homecomfortlab.co.uk/home-comfort-cost-index/)
  What it costs per hour, per evening and per month to heat, dry and cool a UK home at the Ofgem price cap for 1 October to 31 December 2026. Updated every quarter.

## Running cost tables

- [Dehumidifier running costs: popular models compared](https://homecomfortlab.co.uk/damp/dehumidifier-running-costs/)
  What each popular dehumidifier costs per hour and per month at the current price cap, from its rated power.
- [Dehumidifier noise and capacity table](https://homecomfortlab.co.uk/damp/dehumidifier-noise-and-capacity/)
  Every model we list, with its extraction rate, tank size, noise level and power, in one sortable table.
- [Heated airer running costs](https://homecomfortlab.co.uk/heating/heated-airer-running-costs/)
  What heated clothes airers cost per hour and per load at the current price cap, and how that compares with a tumble dryer.
- [Electric blanket and heated throw running costs](https://homecomfortlab.co.uk/heating/electric-blanket-running-costs/)
  What electric blankets and heated throws cost per hour, per month and per winter at the current price cap.
- [Oil radiator vs fan heater vs halogen heater: running costs](https://homecomfortlab.co.uk/heating/oil-radiator-vs-fan-heater-vs-halogen/)
  Which electric heater is cheapest to run, how thermostats change the answer, and which suits which room.

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Running costs use 26.32p per kWh for electricity and 7.97p per kWh for gas, the [Ofgem price cap, Direct Debit average for England, Scotland and Wales](https://ofgem.gov.uk/news/changes-energy-price-cap-between-1-october-and-31-december-2026) for 1 October to 31 December 2026.