Feature · Free Forever
83 calculators.
Always in your pocket.
Grade, slope, volume, pipe, compaction, concrete — 83 precision calculators built into Gradelog. Free forever. No account required. Do the math in the field, not in your head.
What it does
Grade & slope calculators
- Grade percent from rise and run
- Slope stake and cut/fill calculations
- Rod reading and benchmark elevation
- Superelevation and road crown
Volume & earthwork calculators
- Cut/fill volume from grid shots
- Excavation and trench volume
- Earthwork volume by end-area method
- Cubic yards from dimensions
Pipe & utility calculators
- Pipe grade and slope from inverts
- Invert elevation from grade and length
- Manhole drop calculation
- Sewer velocity and hydraulic grade
Concrete & compaction calculators
- Concrete bag and slab calculators
- Compaction percent (Proctor reference)
- Rebar spacing and quantity
- F-number for concrete flatwork
How it works
01
Pick your calculator
Select from 83 calculators organized by category — grade, volume, pipe, compaction, concrete, and more.
02
Enter your values
Enter your field measurements. Calculators are designed for field use — clear inputs, instant results.
03
Get the answer
Results display instantly with the formula shown. No second-guessing. No math errors.
04
Log it to the job
Calculation results can be saved to the job record or used as inputs for grade shots, production logs, or reports.
Who uses this
Field operators & foremen
Do the math in 30 seconds, not 5 minutes. Stop doing grade calculations in your head or calling the office.
Superintendents
Check your numbers before you move earth. A calculator in the field beats a calculator in the office every time.
Estimators & engineers
83 precision calculators — free, no account required. Bookmark the specific calculator you use most.
Built for your industry
Common questions
Are the Gradelog calculators really free forever?
Yes. All 83 precision calculators are permanently free — no account required, no credit card, no limit on use. The free plan also includes 5 AI field assistant queries per day.
What categories of calculators does Gradelog include?
Gradelog calculators cover: grade and slope, cut/fill and earthwork volume, pipe grade and utility, concrete (slab, footing, bag count, rebar), compaction, drainage, laser and GPS setup, staking, and miscellaneous field calculations. New calculators are added regularly.
Can calculation results be saved to a job record?
Yes. On paid plans, calculator results can be logged as notes or field records tied to a specific job. This creates a documented record of field calculations for as-built and dispute purposes.
Does Gradelog work offline for calculations?
Yes. The calculators work fully offline — no internet connection required. Gradelog is a Progressive Web App (PWA) designed for field use with intermittent connectivity.