diff --git a/runners/calculator/qalculate_engine.cpp b/runners/calculator/qalculate_engine.cpp
--- a/runners/calculator/qalculate_engine.cpp
+++ b/runners/calculator/qalculate_engine.cpp
@@ -113,6 +113,9 @@
     po.negative_exponents = false;
     po.lower_case_e = true;
     po.base_display = BASE_DISPLAY_NORMAL;
+    #if defined(QALCULATE_MAJOR_VERSION) && defined(QALCULATE_MINOR_VERSION) && (QALCULATE_MAJOR_VERSION > 2 || (QALCULATE_MAJOR_VERSION == 2 && QALCULATE_MINOR_VERSION >= 2))
+    po.interval_display = INTERVAL_DISPLAY_SIGNIFICANT_DIGITS;
+    #endif
 
     result.format(po);