- 1RM (One-Rep Max) & Training Weight Calculator | CalcBE
Estimate your 1RM from weight and reps using common formulas, then convert to training weights by %1RM or target reps. Includes rounding options and Training Max (TM).
- 2D geometry calculator – area & perimeter of shapes | CalcBE
Compute area and perimeter for rectangles, circles, triangles, trapezoids and regular polygons from side lengths, radii or heights, with formulas shown for homework and quick design checks.
- 2D graphing calculator – plot and intersect functions | CalcBE
Plot up to three functions, find intercepts, intersections and extrema numerically, and explore the graph with zoom, pan, shareable URLs and clear step-by-step logs.
- 3D Geometry Calculator (Sphere, Cylinder, Cone, Prism) | CalcBE
Compute volume and surface area for spheres, cylinders, cones, rectangular and regular prisms—with example inputs, step-by-step formulas, and a shareable result link.
- A260 concentration & purity calculator (A260/280, A260/230) | DNA/RNA | CalcBE
Calculate DNA/RNA concentration (ng/µL, µg/mL) and purity ratios (A260/280, A260/230) from A260/A280/A230 and dilution. Includes dsDNA/RNA factor presets, total amount from volume, optional blank correction, CSV/LaTeX…
- Acid-base titration curve and pH calculator
Free acid-base titration calculator for strong and weak acids and bases. Compute pH at any point and generate titration curves with step-by-step explanations.