Scale dimensions accurately from site, lab, or CAD. Choose length, area, volume, or percent mode. Save results, download files, and validate designs confidently today.
| Scenario | Original | Target | k (linear) | k² (area) | k³ (volume) | Applied 40 → |
|---|---|---|---|---|---|---|
| Model → Prototype (length) | 120 | 300 | 2.5 | 6.25 | 15.625 | 100 |
| Surface area change | 2.0 m² | 8.0 m² | 2 | 4 | 8 | 80 |
| Drawing 1:100 → 1:50 | — | — | 2 | 4 | 8 | 80 |
Use the linear factor k to resize lengths such as spans, diameters, offsets, and elevations. If an original dimension is 250 mm and the target is 300 mm, then k = 1.2. Apply the same factor to dependent lengths to keep proportions consistent. Enter an Applied Value to scale a specific dimension and store the output in your history. Absolute tolerances may not scale; confirm limits against standards, fits, and manufacturing capability before adopting a scaled tolerance.
When surface-driven quantities dominate, the area factor k² is often more realistic than k. Paint quantity, liner area, insulation coverage, and many heat-transfer surfaces scale with area. A 10% linear increase (k = 1.10) becomes a 21% area increase (k² = 1.21). Use the result to align takeoffs and reduce under-ordering for area-based materials.
For tanks, concrete pours, excavations, and capacity checks, use the volume factor k³. The same 10% linear change (k = 1.10) becomes a 33.1% volume change (k³ = 1.331). If density is constant, mass scales similarly. This supports feasibility sizing, prototype-to-full-scale comparisons, and quick validation of pumps, foundations, and handling systems.
The drawing conversion mode helps when a layout shifts between ratios such as 1:100 and 1:50. The calculator converts between scales using (ToNum/ToDen) ÷ (FromNum/FromDen), producing one multiplier for printed dimensions. This prevents plan-reading errors caused by applying the wrong sheet scale. After conversion, spot-check a known reference length to confirm plot settings and measurement tools.
Scaling is only as reliable as your units and input quality. Enter original and target values in the same unit system, then round k to match measurement resolution while keeping full precision for derived factors. Percent mode is useful for quick uplifts, shrink allowances, and field adjustments where only a percentage change is known. Save runs to the history table for traceability, then export CSV for spreadsheets and PDF for submittals, calculation notes, and design logs.
It is the ratio of target to original. Multiply any compatible length by k to obtain the scaled length while preserving geometric proportion.
Choose based on what drives the quantity: lengths use k, surfaces use k², and capacities or masses (constant density) use k³. This matches the underlying geometry.
Keep units consistent. Convert first, then enter values. The unit selectors are labels to reduce mistakes; they do not automatically convert inputs.
Applied Value lets you scale a specific dimension, load, or measurement directly. The calculator returns Applied × k and records both inputs and results in the session history.
It compares two ratios (for example 1:100 to 1:50) and outputs one multiplier. Use it to translate measured drawing values between scales without re-deriving the ratio each time.
Exports include the recent calculation table: timestamps, mode, k, k², k³, inputs, and outputs. Use CSV for analysis and PDF for sharing or recordkeeping.
| Time | Mode | k | k² | k³ | Original | Target | Applied | Output | Change |
|---|---|---|---|---|---|---|---|---|---|
| No calculations yet. | |||||||||
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.