Standard Rounding Convention Guidance
Standard Rounding Convention Guidance
The Michigan Department of Transportation (MDOT) utilizes the following standard rounding convention for accuracy and consistency for all quantity postings.
| Unit | Type | Accuracy |
|---|---|---|
| Acre | Area | 0.000 |
| Sft | Area | 0.00 |
| Sin | Area | 0.00 |
| Syd | Area | 0.00 |
| Dlr | Dollar | 0.00 |
| Ea | Each | 0.00 |
| Ft | Length | 0.00 |
| Lnmi | Length | 0.000 |
| Mile | Length | 0.000 |
| Rbmi | Length | 0.000 |
| Sta | Length | 0.00 |
| Cft | Volume | 0.00 |
| Cyd | Volume | 0.00 |
| Gal | Volume | 0.00 |
| Lb | Weight | 0.00 |
| Ton | Weight | 0.00 |
Calculations should not be rounded until the final quantity value is ready to be posted.
Standard Rounding Convention Examples
The following are some examples of how values should be rounded and posted.
Syd
12.25 x 55.18 = 675.955 Sft
- +
12.12 x 44.30 = 536.916 Sft
- +
1.81 x 19.54 = 35.367 Sft
Total: 1248.238 Sft / 9 Sft/Syd = 138.693 Syd
Posting: 138.69 Syd
Cyd
12.25 x 55.18 x 1.12 = 757.070 Cft
- +
12.12 x 44.31 x 1.11 = 596.111 Cft
Total: 1353.181 Cft / 27 Cft/Cyd = 50.118 Cyd
Posting: 50.12 Cyd
HMA
12 x 231 = 2,772 Sft
- +
2,772 x 1Syd/9Sft = 308 Syd
308 x 110 Lbs/Sy-In x 1.5 In = 50,820 Lbs
50,820 / 2,000 Lbs/Ton
= 25.41 Tons