Prepare the cucumbers. Wash the cucumbers well and trim about ⅛ inch off the blossom end (the end opposite the stem). This helps keep the pickles nice and crisp.
Pack the jar. Add the dill, black peppercorns, and any optional add-ins like jalapeño or ginger to a clean, sterilized jar. Pack the cucumbers in tightly, leaving about 1 inch of headspace at the top.
Measure the water. Add the jar with cucumbers to the scale and zero out the scale. Add water until covered and measure the weight in grams. Mulltiply this number by 0.03 (3%) to determine how much salt is needed. Add the measure salt into the jar, seal tightly and gently shake to dissolve the salt. No kitchen scale? Simply use 1 tablespoon of non-iodized salt for every 2 cups of water. Repeat this step until the cucumbers are compltely submerged in the salt brine. Keep everything submerged. Make sure the cucumbers are completely covered by the brine. Place a fermentation weight on top if needed to keep them below the surface.
Ferment. Loosely cover the jar or use a fermentation lid and let it sit at room temperature (68–75°F / 20–24°C), away from direct sunlight, for 3–6 days. If using a regular lid, burp the jar once a day to release any built-up pressure. (burping the jar= opening the jar for 30-60 seconds to release the built up gas, then releasing the jar)
Taste and refrigerate. Begin tasting around day 3. My personal sweet spot is day 4, when the pickles are perfectly crunchy with just the right amount of tang. Once they've reached your preferred flavor, seal the jar with a regular lid and transfer it to the refrigerator.