Use the online currency site to establish the current exchange rate. Popular sites include xe.com, which publishes the latest rates for the most accurate conversion. Exchange rates fluctuate over time and can change significantly depending on market conditions. Make sure you check them frequently while traveling to avoid any unpleasant surprises. Most national newspapers also publish major currency rates in their business and finance section if you do not have Internet access.
If the NZ dollar is at 2.1 against the pound, this means that for every pound exchanged you will receive $2.10 NZ.
To convert sums from GBP to NZ, multiply the amount by the exchange rate. For example, £15.00 x 2.1 = $31.50 NZ.
To convert back from New Zealand dollars to Pounds Sterling, divide the sum by the exchange rate So $60.00 / 2.1 = £28.5714. Round the figures to the nearest penny to get £28.57