| 100% | HOURGLASS | 9 | Instrument for measuring time with sand |
| 55% | SUNDIAL | 7 | Instrument for telling the time with shadows |
| 48% | PROTRACTOR | 10 | Instrument for measuring angles |
| 47% | BAROMETER | 9 | Instrument for measuring atmospheric pressure |
| 47% | BOLOMETER | 9 | Instrument for measuring radiant heat |
| 46% | SEXTANT | 7 | Navigational instrument for measuring distance |
| 46% | PROTRACTOR | 10 | Semicircular instrument for measuring angles |
| 46% | SEXTANT | 7 | Navigational instrument for measuring angles |
| 45% | MANOMETER | 9 | Instrument for measuring the pressure of a fluid |
| 45% | STOPWATCH | 9 | Device for measuring time very precisely |
| 44% | LTM | 3 | Vol___eter: Instrument for measuring electric potential |
| 44% | BOLOMETER | 9 | Langley's instrument for measuring radiant energy |
| 43% | BASSOON | 7 | Instrument for singer with nothing on |
| 41% | SUNDIALS | 8 | Garden instruments for estimating time |
| 40% | LIDAR | 5 | Method for measuring distances with lasers |
| 40% | METAPHOR | 8 | Sand in an hourglass, for time |
| 40% | TACH | 4 | Instrument with a needle, for short |
| 40% | BDAY | 4 | Time for cake with candles, informally |
| 38% | SAX | 3 | Instrument with alto and tenor varieties, for short |
| 38% | SAX | 3 | Instrument with tenor and alto varieties, for short |
| 38% | NEW | 3 | With 4-Across, time for a big party |
| 38% | SKI | 3 | With 51 Down, high time for snow sports |
| 38% | LATTE | 5 | Overdue, with time for a coffee |
| 38% | TARTLET | 7 | Rattle about with time for canape? |
| 38% | PIT | 3 | With 5-Across, times for tire changes in NASCAR |
| 38% | PEI | 3 | Canadian province with red sand, for short |
| 37% | MEAL | 4 | Iron, perhaps, with no time for breakfast |
| 37% | GRABANDGO | 9 | Like lunches for workers with little time |
| 37% | WATER | 5 | Wear off, with time for a drink |
| 37% | YEARNS | 6 | Longs for time with Poles |