Travel & transport

Check a bag against an airline weight allowance, see how much is spare or over, and the excess fee at a given rate per kilogram

Check whether a trailer or caravan is legal and safe to tow from the kerb weight, gross train weight, towball limit and trailer weight, against the noseweight limit and the 85% guideline

Convert a clothing size between UK, US, EU and international (XS to XXXL) for womenswear or menswear, tops or bottoms, from any one of them

Work out a car value year by year from the purchase price and an annual depreciation rate, with the value today, at a chosen year, and the total lost

Work out the total cost of a trip from nights, daily spend by category, flights and a contingency, per person and in total, with a daily allowance left over once the fixed costs are taken out

Build a packing list from trip length, climate and trip type, with clothing quantities worked out from the number of nights

Look up the plug types, voltage and frequency for a country, and whether an adaptor or a transformer is needed coming from another country

Look up the handful of phrases worth knowing in a language: please, thank you, hello, how much, where is, and help