Fondsites Tools

Fondsites Tools

Calculators, checkers, diagnostics, and decision helpers for moments when a guidebook is too much and a guess is not enough.

Browse tools Open diagnostics Open labs Use logs Explore topic worlds

Why Fondsites builds tools, not just guides

Guidebooks are useful when you want depth. Tools are useful when you are standing at the counter, comparing a repair quote, planning backup power, or deciding whether a spec sheet actually fits your life.

These pages keep the explanation visible beside the form. The calculators show assumptions, avoid indexable result URLs, and link back into the topic worlds when you want more context.

Tool Directory

Each tool is crawlable, static-friendly, and designed to answer one practical question without pretending the result is more certain than the inputs.

Coffee scale, pour-over dripper, beans, and measurement marks arranged for ratio planning.

Coffee

Coffee Ratio Calculator

Calculate coffee and water amounts for common brewing methods, strength preferences, and unit systems.

Espresso machine, timer, portafilter, grind dial, and tasting icons for shot troubleshooting.

Coffee

Espresso Dial-In Troubleshooter

Diagnose sour, bitter, weak, fast, slow, or uneven espresso shots without changing every variable at once.

Repaired household object on a workbench with tools, a part, receipt, and decision checklist.

Keepers Guild

Repair-or-Replace Calculator

Compare repair cost, replacement cost, safety risk, time, parts, and sentimental value before deciding what to fix.

Safety glasses, unplugged power cord, simple tools, and abstract warning shapes beside a repair checklist.

Keepers Guild

Beginner Repair Safety Checker

Screen a beginner repair for electrical, heat, pressure, chemical, sharp-part, water, and structural red flags.

Countertop water filter with droplet icons, certification document, magnifying glass, and lab beaker.

Clear Water Lab

Water Filter Claim Checker

Connect a filter claim to contaminant concerns, certification language, and what to verify before buying.

Home backup battery powering a lamp, router, refrigerator, and laptop with simple energy flow lines.

Home Energy Lab

Home Battery Runtime Calculator

Estimate runtime for a home battery or portable power station against essential loads.

Tiny home on a trailer connected to a tow vehicle with scale and safety margin graphics.

Tiny Homes

Tiny Home Weight & Towing Checker

Estimate loaded tiny-home trailer weight, tongue weight, and safety margin before comparing tow ratings.

Room sketch, tape measure, air purifier, and clean-air delivery cards arranged for purifier sizing.

Clean Air Society

Air Purifier Sizing Calculator

Estimate CADR, air changes per hour, and purifier coverage from room size and ceiling height.

HVAC filter slot, pleated filter, flashlight, calendar, and return grille for filter checking.

Clean Air Society

HVAC Filter Checker

Check filter age, fit, MERV level, and runtime before upgrading or waiting longer.

Closed-window smoke-day room with air purifier, spare filters, activity pause cards, and weathered outdoor haze.

Clean Air Society

Smoke-Day Plan Builder

Plan windows, filtration, activities, cooling, and filter checks for smoky outdoor air.

Home office with CO2 monitor, cracked door, openable window, desk fan, and purifier for ventilation planning.

Clean Air Society

Ventilation and CO2 Helper

Use CO2 trend, people count, and outdoor conditions to plan a stale-room reset.

Moisture triage table with humidity gauge, flashlight, dehumidifier, towel, raised storage bin, and open closet.

Clean Air Society

Humidity and Musty-Smell Triage

Sort humidity, condensation, damp materials, and musty smells into safer next checks.

Living room purifier placement setup with clear space around vents, sofa, curtains, outlet, and airflow path.

Clean Air Society

Purifier Placement Planner

Choose a purifier location that avoids blocked intakes, walls, curtains, and weak airflow paths.

Wristwatch beside a measuring tape with simple dimension callout lines.

Watches

Watch Size Fit Calculator

Compare wrist size, case diameter, lug-to-lug length, thickness, and style preference before buying.

Ring planning desk with ring box, budget worksheet, gemstone shapes, and soft natural light.

Engagement Rings

Engagement Ring Budget Allocator

Allocate a ring budget across center stone, setting, metal, appraisal, resizing, insurance, and contingency.

Mechanical keyboard switches, keycaps, switch puller, and abstract sound wave shapes on a clean desk.

Mechanical Keyboards

Mechanical Keyboard Switch Finder

Choose a switch family from sound, feel, force, typing, gaming, office noise, hot-swap, and budget preferences.

Abstract defensive attack-path map with assets, identities, exposure nodes, and control checkpoints.

Cybersecurity Encyclopedia

Attack Path Sketcher

Map assets, identities, exposures, and controls into defensive questions.

Defensive alert triage worksheet with severity, confidence, asset, and evidence cards.

Cybersecurity Encyclopedia

Alert Triage Helper

Build a severity and confidence worksheet from alert context.

Ransomware readiness scorecard with backup, restore, MFA, logging, containment, and recovery cards.

Cybersecurity Encyclopedia

Ransomware Readiness Scorecard

Check recovery readiness before an emergency.

Cloud exposure prioritization board with identity, data, reachability, and logging nodes.

Cybersecurity Encyclopedia

Cloud Exposure Prioritizer

Rank cloud exposure concerns without scanning anything.

Incident evidence note template with timeline, entity, decision, and unknown cards.

Cybersecurity Encyclopedia

Evidence Note Builder

Turn triage facts into a clear incident note template.

Security control crosswalk linking concerns to framework-style defensive language.

Cybersecurity Encyclopedia

Security Control Crosswalk

Translate a concern into plain-English control mapping language.

Utility layers around the tools

Diagnostics help you choose the next check, labs show how to document small tests, and logs keep decisions reviewable without creating public result pages.

Fondsites Diagnostics Fondsites Labs Fondsites Logs

Related topic worlds

Coffee Mastery Keepers Guild Clear Water Lab Clean Air Society Home Energy Lab Tiny Home Living Watches Engagement Rings Mechanical Keyboards