Marianne — My experiments show that the TCH's fuel gauge is pretty linear over the top 3/4 of its range. Each minor "tick" mark represents about 3.5 L (~0.9 galUS). So, if you approximate each tick mark by 1 gal you'll be reasonably close. In warm weather, I find that I get about 46 km (~29 mi) per tick mark. But, don't forget that when filled the gauge goes ~1 tick (gas pump dependent) above "full," and when it reads 'E' you still have quite a bit of fuel left.

Stan