Calculator General
Formula or algorithm, variables, worked arithmetic, interpretation and assumptions.
How ToolLott calculates and verifies results
ToolLott treats methodology as part of the product: formulas, processing logic, worked examples, assumptions, limitations and sources are tied to the production tool instead of being written as unrelated SEO copy.
Methodology principles
Tool logic first
The explanation must agree with the working production tool.
Verified examples
Worked examples use known inputs and outputs from the ToolLott QA process.
Visible assumptions
Important simplifications and support boundaries are stated next to the method.
Authoritative sourcing
Health, finance, engineering and standards-based pages use appropriate primary or authoritative references.
Seven content archetypes
ToolLott does not force one formula template onto every product. Different tool families use different explanation structures.
Engineering Construction
Governing equation, units, explicit design assumptions, worked calculation, limitations and technical source.
Finance
Formula, cash-flow assumptions, worked calculation, inclusions/exclusions, interpretation and authoritative finance source.
Health
Formula/source, screening interpretation, population applicability, limitations and authoritative health source.
File Media
Input-to-processing-to-output explanation, support boundary, privacy, preservation/change notes and verification steps.
Developer Data
Transformation rules, input/output example, standard/reference, edge cases, errors and privacy.
Generator Document
Inputs used, assembly logic, example output, review responsibility, limitations and relevant guidance.
How a result is explained
Where practical, the page has two complementary layers: permanent indexable methodology and a live How ToolLott got this answer breakdown that responds to the current inputs. File and generator tools explain the transformation or assembly process instead of inventing a mathematical formula.
Quality controls
- Methodology must match the production tool logic.
- Worked examples must reproduce verified outputs.
- Assumptions and limitations are required for complex or sensitive calculations.
- Health, finance, engineering and legal topics receive stricter source and disclaimer checks.
- No fake authors, reviewers, ratings or testimonials are added for search visibility.
- Open-source processing components are disclosed through ToolLott's dependency registry.
Flagship reference pages
The original twelve flagship pages remain the locked cross-archetype reference set used to judge layout, depth, transparency and QA as methodology expands.
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- JSON Formatter/Validator Build 0178
- Merge PDF Build 0278
- Compress Image Build 0261
- QR Code Generator Build 0296
- Resume Builder Build 0239
Methodology rollout status
269 public tools have editorial methodology records; 19 incubated concepts are retained in source but are not part of the launch-facing public catalogue. The current rollout expands in controlled, QA-gated batches while preserving the same production-logic, source-quality and worked-example requirements.
Methodology registry version 1.0. Last updated 2026-08-12.