Fondsites Tools

Fondsites presents

The Workbench

Calculators, checkers, and decision helpers for the moment a guidebook is too much and a guess is not enough. Change the inputs; the answer updates in your browser.

  • 38 tools
  • 11 stations
  • No accounts
  • Nothing saved
Pick a tool

Measure twice · decide once

On the benchIn rotation
Flagship tool Repair-or-Replace Calculator Estimate whether a repair is worth exploring before you spend money or open the object. Compare repair cost, replacement cost, safety risk, time, parts, and sentimental value before deciding what to fix. Keepers Guild Repair & Keeping Open tool

Station 01

Coffee & Taste

Brew & taste

2 tools

Coffee Coffee Ratio Calculator Calculate coffee and water amounts for common brewing methods, strength preferences, and unit systems. Open tool Coffee Espresso Dial-In Troubleshooter Diagnose sour, bitter, weak, fast, slow, or uneven espresso shots without changing every variable at once. Open tool

Station 02

Kitchen & Preserving

Season & keep

1 tools

Salt Works Brine Salt Calculator Convert a recipe's salt percentage into a weighed amount for your batch and your salt. Open tool

Station 03

Repair & Keeping

Fix & maintain

2 tools

Keepers Guild Repair-or-Replace Calculator Compare repair cost, replacement cost, safety risk, time, parts, and sentimental value before deciding what to fix. Open tool Keepers Guild Beginner Repair Safety Checker Screen a beginner repair for electrical, heat, pressure, chemical, sharp-part, water, and structural red flags. Open tool

Station 04

Water & Home Safety

Water & safety

1 tools

Clear Water Lab Water Filter Claim Checker Connect a filter claim to contaminant concerns, certification language, and what to verify before buying. Open tool

Station 05

Energy & Tiny Homes

Power & load

2 tools

Home Energy Lab Home Battery Runtime Calculator Estimate runtime for a home battery or portable power station against essential loads. Open tool Tiny Homes Tiny Home Weight & Towing Checker Estimate loaded tiny-home trailer weight, tongue weight, and safety margin before comparing tow ratings. Open tool

Station 06

Mobility & Home

Ride & carry

5 tools

The E-Bike Workshop Range Reality Calculator Estimate usable e-bike range with hills, weather, cargo, assist level, battery age, and reserve. Open tool The E-Bike Workshop Cargo Setup Picker Match groceries, school bags, passengers, and weather to a stable cargo-bike setup. Open tool The E-Bike Workshop Lock Risk Checklist Match the lock plan to the stop, rack, battery, accessories, and records. Open tool The E-Bike Workshop Battery Care Planner Plan safer charging, storage, temperature, damage, and stop-use habits for e-bike batteries. Open tool The E-Bike Workshop Commute Comfort Audit Find the rain, darkness, hill, surface, storage, or arrival friction that keeps the bike home. Open tool

Station 07

Clean Air & Home Comfort

Air & comfort

6 tools

Clean Air Society Air Purifier Sizing Calculator Estimate CADR, air changes per hour, and purifier coverage from room size and ceiling height. Open tool Clean Air Society HVAC Filter Checker Check filter age, fit, MERV level, and runtime before upgrading or waiting longer. Open tool Clean Air Society Smoke-Day Plan Builder Plan windows, filtration, activities, cooling, and filter checks for smoky outdoor air. Open tool Clean Air Society Ventilation and CO2 Helper Use CO2 trend, people count, and outdoor conditions to plan a stale-room reset. Open tool Clean Air Society Humidity and Musty-Smell Triage Sort humidity, condensation, damp materials, and musty smells into safer next checks. Open tool Clean Air Society Purifier Placement Planner Choose a purifier location that avoids blocked intakes, walls, curtains, and weak airflow paths. Open tool

Station 08

Aquascape & Planted Tanks

Tanks & plants

5 tools

Aquascape Studio Tank Size Reality Check Check volume, footprint, filled weight, stand confidence, and livestock ambition before buying. Open tool Aquascape Studio Plant Light Matcher Match plant ambition, light strength, timer length, floaters, and CO2 plan before algae takes over. Open tool Aquascape Studio Water Change Planner Turn tank size, stocking, nitrate trend, age, and access into a calmer water-change rhythm. Open tool Aquascape Studio Stocking Caution Checker Pause before buying animals that need more room, companions, stable water, or specialist care. Open tool Aquascape Studio Algae Diagnosis Guide Read common algae clues and pick the least dramatic next step. Open tool

Station 09

Watches, Rings & Gear

Fit & spec

3 tools

Watches Watch Size Fit Calculator Compare wrist size, case diameter, lug-to-lug length, thickness, and style preference before buying. Open tool Engagement Rings Engagement Ring Budget Allocator Allocate a ring budget across center stone, setting, metal, appraisal, resizing, insurance, and contingency. Open tool Mechanical Keyboards Mechanical Keyboard Switch Finder Choose a switch family from sound, feel, force, typing, gaming, office noise, hot-swap, and budget preferences. Open tool

Station 10

Create

Play & make

5 tools

Solo Tabletop Studio Solo Game Finder Choose a solo board game, journaling RPG, print-and-play, or map adventure for tonight's real constraints. Open tool Solo Tabletop Studio Oracle Table Builder Design yes/no, weighted, sensory, encounter, and complication tables that move solo play forward. Open tool Solo Tabletop Studio Campaign Log Template Generate a campaign log structure that preserves continuity without turning play into admin work. Open tool Solo Tabletop Studio Shelf Space Planner Plan shelf capacity, active campaign bins, zine storage, and growth margin for a small tabletop collection. Open tool Solo Tabletop Studio First Session Generator Create a first-session plan with setup, opening prompt, rules boundary, log note, and clean stop. Open tool

Station 11

Cyber Defense

Defend & verify

6 tools

Cybersecurity Encyclopedia Attack Path Sketcher Map assets, identities, exposures, and controls into defensive questions. Open tool Cybersecurity Encyclopedia Alert Triage Helper Build a severity and confidence worksheet from alert context. Open tool Cybersecurity Encyclopedia Ransomware Readiness Scorecard Check recovery readiness before an emergency. Open tool Cybersecurity Encyclopedia Cloud Exposure Prioritizer Rank cloud exposure concerns without scanning anything. Open tool Cybersecurity Encyclopedia Evidence Note Builder Turn triage facts into a clear incident note template. Open tool Cybersecurity Encyclopedia Security Control Crosswalk Translate a concern into plain-English control mapping language. Open tool

Why tools, not just guides

Guidebooks are for depth. Tools are for the counter, the repair quote, the backup-power plan, the spec sheet that might not fit your life. Every result shows its assumptions, avoids indexable result URLs, and links back into the topic world when you want the full story.

Around the tools

Diagnostics Labs Logs

Topic worlds

Coffee Salt Works Keepers Guild Clear Water Lab Clean Air Society Home Energy Lab E-Bike Workshop Tiny Homes Watches Engagement Rings Mechanical Keyboards Aquascape Studio Solo Tabletop Studio Cybersecurity Encyclopedia