Most swimmers don't differentiate that much b/w a yard or metered pool. Meaning i do the exact same workout regardless of whether or not I'm in a 25 yd or 25 meter pool Times will be just slightly slower in the meter pool.
Just set up a little Excel spread sheet. You could enter the number of laps, and it would spit out distance in yards, miles, meters, kilometers, furlongs, cubits, or whatever you program it to. My Race Log